Method for transmitting and receiving uplink signal, user equipment and base station

Abstract

The present invention relates to a method of transmitting and receiving an uplink signal, and a user equipment and a base station. Disclosed is a method of transmitting and receiving a scheduling request between a terminal and a base station in a wireless communication system and an apparatus supporting the same.

Description

[0001] This application is a divisional application of the original application No. 201880017517.8 (International Application No. PCT / KR2018 / 005149, filed on May 3, 2018, entitled "Method for transmitting and receiving scheduling request between terminal and base station in wireless communication system and apparatus supporting the same"). TECHNICAL FIELD TECHNICAL FIELD

[0002] The following description relates to a wireless communication system, and more particularly, to a method for transmitting and receiving a scheduling request between a user equipment (UE) and a base station (BS) in a wireless communication system and an apparatus supporting the same. BACKGROUND

[0003] Wireless access systems have been widely deployed to provide various types of communication services such as voice or data. Typically, a wireless access system is a multiple access system that supports communication of multiple users by sharing available system resources (bandwidth, transmission power, etc.) among the multiple users. Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency division multiple access (SC-FDMA) systems.

[0004] As many communication devices need higher communication capacity, the necessity for mobile broadband communication greatly improved beyond the existing radio access technology (RAT) increases. In addition, massive machine type communications (MTC), which is capable of providing various services anytime anywhere by connecting many devices or things to each other, is considered in the next-generation communication system. Further, communication system design capable of supporting services / UEs sensitive to reliability and latency has been discussed.

[0005] As described above, the introduction of the next-generation RAT considering enhanced mobile broadband communication, massive MTC, ultra-reliable and low-latency communication (URLLC), and the like has been discussed. SUMMARY

[0006] TECHNICAL PROBLEM

[0007] An aspect of the present application is to provide a method for transmitting and receiving a scheduling request (SR) between a user equipment (UE) and a base station (BS) in a wireless communication system and an apparatus supporting the same.

[0008] Those skilled in the art will understand that the objects, which can be achieved by the present disclosure, are not limited to those specifically described hereinabove and the above and other objects of the present disclosure will become more fully understood from the following detailed description.

[0009] TECHNICAL SOLUTION

[0010] The present application provides a method for transmitting and receiving a scheduling request (SR) between a user equipment (UE) and a base station (BS) in a wireless communication system and a device supporting the same.

[0011] In an aspect of the present application, a method for transmitting an SR by a UE to a BS in a wireless communication system includes the steps of receiving, from the BS, first configuration information of one or more first uplink resources for SR transmission and second configuration information of a second uplink resource carrying uplink control information (UCI), and transmitting, when N first uplink resources for N SR transmissions (N is a natural number greater than 1) overlap with the second uplink resource in a time domain, bit information indicating SR information for the N SR configurations together with the UCI in the second uplink resource.

[0012] The first configuration information can be received through higher layer signaling.

[0013] Further, the second configuration information can be received in downlink control information (DCI).

[0014] The bit information indicating the SR information for the N SR configurations can indicate information about one SR configuration of the N SR configurations and positive SR information corresponding to the one SR configuration.

[0015] Alternatively, the bit information indicating the SR information for the N SR configurations can include a plurality of bits indicating whether SR information corresponding to each of the N SR configurations is a positive SR or a negative SR.

[0016] When the SR information corresponding to each of the plurality of bits is a positive SR, the bit can have a value 1, and when the SR information is a negative SR, the bit can have a value 0.

[0017] Further, the plurality of bits can be configured in the order of identification information about the N SR configurations.

[0018] In the above configuration, the N first uplink resources can completely overlap or partially overlap with the second uplink resource in the time domain.

[0019] The second uplink resource can correspond to a physical uplink control channel (PUCCH) resource carrying the UCI.

[0020] Further, the bit information can be transmitted in the second uplink resource using an encoded bit format generated by combining the bit information with the UCI.

[0021] In the above configuration, the UCI can include channel state information (CSI) or hybrid automatic repeat request acknowledgement (HARQ-ACK) information.

[0022] In another aspect of the present application, a method of receiving, by a BS, an SR from a UE in a wireless communication system includes the steps of transmitting, to the UE, first configuration information of one or more first uplink resources for SR transmission and second configuration information of a second uplink resource carrying uplink control information (UCI), and receiving, in the second uplink resource together with the UCI, bit information indicating SR information for N SR configurations when N first uplink resources for N SR transmissions (N is a natural number greater than 1) overlap with the second uplink resource in a time domain.

[0023] In another aspect of the present application, a UE transmitting an SR to a base station (BS) in a wireless communication system includes a receiver, a transmitter, and a processor operatively connected to the receiver and the transmitter. The processor is configured to receive, from the BS, first configuration information of one or more first uplink resources for SR transmission and second configuration information of a second uplink resource carrying uplink control information (UCI), and transmit, in the second uplink resource together with the UCI, bit information indicating SR information for N SR configurations when N first uplink resources for N SR transmissions (N is a natural number greater than 1) overlap with the second uplink resource in a time domain.

[0024] In another aspect of the present application, a BS receiving an SR from a UE in a wireless communication system includes a receiver, a transmitter, and a processor operatively connected to the receiver and the transmitter. The processor is configured to transmit, to the UE, first configuration information of one or more first uplink resources for SR transmission and second configuration information of a second uplink resource carrying uplink control information (UCI), and receive, in the second uplink resource together with the UCI, bit information indicating SR information for N SR configurations when N first uplink resources for N SR transmissions (N is a natural number greater than 1) overlap with the second uplink resource in a time domain.

[0025] In another aspect of the present application, a method of transmitting, by a UE, an SR to a BS in a wireless communication system includes the steps of determining a first physical uplink control channel (PUCCH) format carrying SR information and a second PUCCH format carrying hybrid automatic repeat request acknowledgement (HARQ-ACK) information, and when the first PUCCH format is a PUCCH format including one or two symbols and supporting uplink control information (UCI) of up to two bits, the second PUCCH format is a PUCCH format including four or more symbols and supporting UCI of up to two bits, and the SR information is a positive SR, performing simultaneous transmission of the SR information and the HARQ-ACK information by transmitting only the HARQ-ACK information in the second PUCCH format.

[0026] When the first uplink resource carrying the SR information overlaps in the time domain with the second uplink resource carrying the HARQ-ACK information, simultaneous transmission of the SR information and the HARQ-ACK information can be performed.

[0027] In another aspect of the present application, a UE transmitting an SR to a BS in a wireless communication system includes a receiver, a transmitter, and a processor operatively connected to the receiver and the transmitter. The processor is configured to determine a first physical uplink control channel (PUCCH) format carrying SR information and a second PUCCH format carrying hybrid automatic repeat request acknowledgement (HARQ-ACK) information, and when the first PUCCH format is a PUCCH format including one or two symbols and supporting up to two bits of uplink control information (UCI), the second PUCCH format is a PUCCH format including four or more symbols and supporting up to two bits of UCI, and the SR information is a positive SR, perform simultaneous transmission of the SR information and the HARQ-ACK information by transmitting only the HARQ-ACK information in the second PUCCH format.

[0028] It will be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory, and are intended to provide further explanation of the disclosure as claimed.

[0029] Advantageous Effects

[0030] From the above description, it will be apparent that the embodiments of the present application have the following effects.

[0031] According to the present application, when a first uplink resource carrying a plurality of pieces of scheduling request (SR) information overlaps in the time domain with a second uplink resource carrying acknowledgement / negative acknowledgement (ACK / NACK) information, a user equipment (UE) can transmit bit information corresponding to the plurality of pieces of SR information together with the ACK / NACK information in the second uplink resource.

[0032] Accordingly, the UE can adaptively transmit the plurality of pieces of SR information according to circumstances.

[0033] Effects that can be achieved through the embodiments of the present application are not limited to those specifically described herein, and other effects not described herein can be derived from the following detailed description by those skilled in the art. That is, it should be noted that effects not intended by the present application can be derived by those skilled in the art from the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of the specification. The technical features of the present application are not limited to specific drawings. The features disclosed in each of the drawings are combined with each other to configure new embodiments. The reference numerals in each of the drawings correspond to structural elements.

[0035] Figure 1 is a diagram illustrating physical channels and a signal transmission method using the physical channels.

[0036] Figure 2 is a diagram illustrating an exemplary radio frame structure.

[0037] Figure 3 is a diagram illustrating an exemplary resource grid for a duration of a downlink slot.

[0038] Figure 4 is a diagram illustrating an exemplary structure of an uplink subframe.

[0039] Figure 5 is a diagram illustrating an exemplary structure of a downlink subframe.

[0040] Figure 6 is a diagram illustrating a self-contained subframe structure suitable for the present application.

[0041] Figure 7 and Figure 8 is a diagram illustrating a representative connection method for connecting a TXRU to an antenna element.

[0042] Figure 9 is a diagram schematically illustrating a hybrid beamforming structure according to an embodiment of the present application from the perspective of a TXRU and a physical antenna.

[0043] Figure 10 is a diagram schematically illustrating a beam sweeping operation for a synchronization signal and system information during a downlink (DL) transmission process according to an embodiment of the present application.

[0044] Figure 11 is a diagram illustrating a third scheduling request (SR) transmission method according to an example of the present application.

[0045] Figure 12 is a diagram illustrating an SR transmission method of a user equipment (UE) when an SR has a higher priority than a hybrid automatic repeat request-acknowledgement (HARQ-ACK) according to the present application.

[0046] Figure 13 and Figure 14 is a diagram illustrating an SR transmission method of a UE according to the present application when a HARQ-ACK has a higher priority than an SR.

[0047] Figure 15 is a flowchart illustrating a method of transmitting an SR by a UE according to the present application.

[0048] Figure 16 is a block diagram of a UE and a base station (BS) for implementing the proposed embodiments. DETAILED DESCRIPTION

[0049] Embodiments of the disclosure described below are combinations of specific forms of elements and features of the disclosure. These elements or features can be considered selective unless otherwise mentioned. Each element or feature can be practiced without being combined with other elements or features. Also, embodiments of the disclosure can be constructed by combining elements and / or features. The order of operations described in embodiments of the disclosure can be rearranged. Some constructions or elements of any one embodiment can be included in another embodiment, and can be substituted with corresponding constructions or features of another embodiment.

[0050] In the description of the drawings, detailed descriptions of known processes or steps of the disclosure will be avoided so as not to obscure the subject matter of the disclosure. Also, processes or steps that can be understood by those skilled in the art will not be described again.

[0051] Throughout the specification, when a certain part "includes" a certain component, unless otherwise indicated, this indicates that other components are not excluded, but can be further included. The terms "unit," "-er," and "module" described in the specification indicate a unit for processing at least one function or operation, which can be implemented by hardware, software, or a combination thereof. Also, in the context of the disclosure (more specifically, in the context of the following claims), unless otherwise indicated in the specification or unless the context clearly indicates otherwise, the terms "one," "an," "the," and the like can include both singular and plural representations.

[0052] In embodiments of the disclosure, a data transmission and reception relationship between a base station (BS) and a user equipment (UE) is mainly described. The BS refers to a terminal node of a network, which directly communicates with the UE. A specific operation described as being performed by the BS can be performed by an upper node of the BS.

[0053] That is, it is obvious that, in a network composed of a plurality of network nodes including a BS, various operations performed for communication with a UE can be performed by the BS or a network node other than the BS. The term "BS" can be replaced with a fixed station, a node B, an evolved node B (eNode B or eNB), a gNode B (gNB), an advanced base station (ABS), an access point, etc.

[0054] In the embodiments of the disclosure, the term terminal can be replaced with UE, mobile station (MS), subscriber station (SS), mobile subscriber station (MSS), mobile terminal, advanced mobile station (AMS), etc.

[0055] The transmitting end is a fixed and / or mobile node that provides a data service or a voice service, and the receiving end is a fixed and / or mobile node that receives a data service or a voice service. Thus, on an uplink (UL), the UE can serve as the transmitting end and the BS can serve as the receiving end. Likewise, on a downlink (DL), the UE can serve as the receiving end and the BS can serve as the transmitting end.

[0056] The embodiments of the disclosure can be supported by standard specifications disclosed for at least one wireless access system, including the Institute of Electrical and Electronics Engineers (IEEE) 802.xx system, the 3rd Generation Partnership Project (3GPP) system, the 3GPP Long Term Evolution (LTE) system, the 3GPP 5G NR system, and the 3GPP2 system. In particular, the embodiments of the disclosure can be supported by standard specifications: 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321, 3GPP TS 36.331, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.321, and 3GPP TS 38.331. That is, steps or parts not described in the embodiments of the disclosure for the purpose of clearly disclosing the technical idea of the disclosure can be explained by the above-mentioned standard specifications. All terms used in the embodiments of the disclosure can be explained by the standard specifications.

[0057] The embodiments of the disclosure will now be described in detail with reference to the accompanying drawings. The following detailed description of the embodiments with reference to the drawings is intended to explain the exemplary embodiments of the disclosure, rather than to show only the embodiments that can be implemented according to the disclosure.

[0058] The following detailed description includes specific terms to provide a thorough understanding of the disclosure. However, it will be apparent to one of ordinary skill in the art that a specific term can be replaced with other terms without departing from the technical spirit and scope of the disclosure.

[0059] For example, the term TxOP can be used interchangeably with a transmission period or a reserved resource period (RRP) in the same sense. In addition, a listen-before-talk (LBT) procedure can be performed for the same purpose as a carrier sensing procedure for determining whether a channel state is idle or busy, CCA (clear channel assessment), CAP (channel access procedure).

[0060] Hereinafter, 3GPP LTE / LTE-A systems and 3GPP NR systems, which are examples of wireless access systems, are described.

[0061] Embodiments of the present disclosure are applicable to various wireless access systems, such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc.

[0062] The CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. The TDMA can be implemented as a radio technology such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). The OFDMA can be implemented as a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc.

[0063] The UTRA is a part of the Universal Mobile Telecommunication System (UMTS). The 3GPP LTE is a part of the Evolved UMTS (E-UMTS) that uses the E-UTRA, and adopts OFDMA for DL and SC-FDMA for UL. The LTE-A is an evolved version of the 3GPP LTE.

[0064] Although the embodiments of the present application are described in the context of 3GPP NR system and 3GPP LTE / LTE-A system for clarity, the present application is also applicable to IEEE 802.16e / m system, etc.

[0065] 1.3GPP LTE / LTE-A system

[0066] 1.1. Physical channels and general signal transmission and reception methods using the same

[0067] In a wireless access system, a UE receives information from an eNB on a DL and transmits information to the eNB on a UL. The information exchanged between the UE and the eNB includes general data information and various types of control information. There are many physical channels according to the type / use of the information exchanged between the eNB and the UE.

[0068] Figure 1 Physical channels that can be used in the embodiments of the present disclosure and general signal transmission methods using the same are illustrated.

[0069] When the UE is powered on or enters a new cell, the UE performs an initial cell search (S11). The initial cell search involves acquiring synchronization with the eNB. Specifically, the UE synchronizes its timing with the eNB and acquires information such as a cell identifier (ID) by receiving a primary synchronization channel (P-SCH) and a secondary synchronization channel (S-SCH) from the eNB.

[0070] Then, the UE can acquire information broadcast in the cell by receiving a physical broadcast channel (PBCH) from the eNB.

[0071] During the initial cell search, the UE can monitor a DL channel state by receiving a downlink reference signal (DL RS).

[0072] After the initial cell search, the UE can acquire more detailed system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on information of the PDCCH (S12).

[0073] To complete connection with the eNB, the UE can perform a random access procedure with the eNB (S13 to S16). In the random access procedure, the UE can transmit a preamble on a physical random access channel (PRACH) (S13), and can receive a PDCCH and a PDSCH associated with the PDCCH (S14). In the case of contention-based random access, the UE can additionally perform a contention resolution procedure including transmission of an additional PRACH (S15) and reception of a PDCCH signal and a PDSCH signal corresponding to the PDCCH signal (S16).

[0074] After the above-described procedure, in a general UL / DL signal transmission procedure, the UE can receive a PDCCH and / or a PDSCH from the eNB (S17), and transmit a physical uplink shared channel (PUSCH) and / or a physical uplink control channel (PUCCH) to the eNB (S18).

[0075] Control information transmitted by the UE to the eNB is generally referred to as uplink control information (UCI). The UCI includes a hybrid automatic repeat request acknowledgement / negative acknowledgement (HARQ-ACK / NACK), a scheduling request (SR), a channel quality indicator (CQI), a precoding matrix index (PMI), a rank indicator (RI), etc.

[0076] In the LTE system, the UCI is generally periodically transmitted on the PUCCH. However, if control information and traffic data should be simultaneously transmitted, the control information and the traffic data can be transmitted on the PUSCH. In addition, the UCI can be non-periodically transmitted on the PUSCH upon reception of a request / command from the network.

[0077] 1.2. Resource structure

[0078] Figure 2 FIG. 1 shows an exemplary radio frame structure used in the embodiments of the present disclosure.

[0079] Figure 2 (a) of FIG. 1 shows a frame structure type 1. The frame structure type 1 is applicable to both a full frequency division duplex (FDD) system and a half FDD system.

[0080] One radio frame is 10 ms (T f = 307200 · T s ) long, including 20 equally-sized slots with indices of 0 through 19. Each slot is 0.5 ms (T slot = 15360 · T s ) long. One subframe includes two consecutive slots. The i-th subframe includes the 2nd slot and the (2i+1)th slot. That is, a radio frame includes 10 subframes. The time required to transmit one subframe is defined as a transmission time interval (TTI). Ts is a sampling time given as T s = 1 / (15 kHz x 2048) = 3.2552 x 10 -8 (~33 ns). One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols or SC-FDMA symbols in the time domain x a plurality of resource blocks (RBs) in the frequency domain.

[0081] A slot includes a plurality of OFDM symbols in the frequency domain. Since OFDMA is employed for DL in the 3GPP LTE system, one OFDM symbol denotes one symbol period. The OFDM symbol can be referred to as an SC-FDMA symbol or a symbol period. An RB is a resource allocation unit including a plurality of contiguous subcarriers in a slot.

[0082] In a full FDD system, each of the 10 subframes can be simultaneously used for DL transmission and UL transmission during a 10 ms duration. The DL transmission and the UL transmission are distinguished by frequency. On the other hand, in a half FDD system, a UE cannot simultaneously perform transmission and reception.

[0083] The above-described radio frame structure is merely exemplary. Accordingly, the number of subframes in a radio frame, the number of slots in a subframe, and the number of OFDM symbols in a slot can be varied.

[0084] Figure 2 (b) of FIG. 1 shows a frame structure type 2. The frame structure type 2 is applicable to a time division duplex (TDD) system. One radio frame is 10 ms (T f = 307200 · T s ) long, including two half frames each having 5 ms (= 153600 · T s) long. Each half frame includes five subframes, each of 1 ms (= 30720 · T s ) long. The i-th subframe includes the 2nd time slot and the (2i+1)th time slot, each of which has a length of 0.5 ms (T slot = 15360 · T s ) long. Ts is the sampling time given by T s = 1 / (15 kHz x 2048) = 3.2552 x 10 -8 (about 33 ns).

[0085] A type 2 frame includes a special subframe having three fields, a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). The DwPTS is used for initial cell search, synchronization or channel estimation at the UE, the UpPTS is used for channel estimation at the eNB and UL transmission synchronization with the UE. The GP is used to remove UL interference from UL to DL due to the multipath delay of DL signals.

[0086] The following [Table 1] lists special subframe configurations (DwPTS / GP / UpPTS lengths).

[0087] [Table 1]

[0088]

[0089] In addition, in the LTE Rel-13 system, the configuration of the special subframe (i.e., the lengths of DwPTS / GP / UpPTS) can be newly configured by considering the number X of additional SC-FDMA symbols provided by a higher layer parameter named "srs-UpPtsAdd" (if this parameter is not configured, X is set to 0). In the LTE Rel-14 system, a specific subframe configuration #10 is newly added. For the special subframe configurations {3, 4, 7, 8} of normal cyclic prefix in downlink and the special subframe configurations {2, 3, 5, 6} of extended cyclic prefix in downlink, the UE is not expected to be configured with 2 additional UpPTS SC-FDMA symbols, and for the special subframe configurations {1, 2, 3, 4, 6, 7, 8} of normal cyclic prefix in downlink and the special subframe configurations {1, 2, 3, 5, 6} of extended cyclic prefix in downlink, 4 additional UpPTS SC-FDMA symbols are not expected to be configured.

[0090] [Table 2]

[0091]

[0092] Figure 3 An exemplary structure of a DL resource grid showing the duration of one DL slot that can be used in embodiments of the present disclosure.

[0093] Referring to Figure 3 , a DL slot includes a plurality of OFDM symbols in the time domain. A DL slot includes 7 OFDM symbols in the time domain, and an RB includes 12 subcarriers in the frequency domain, although the disclosure is not limited to this.

[0094] Each element of the resource grid is referred to as a resource element (RE). An RB includes 12×7 REs. The number of RBs in a DL slot, NDL, depends on the DL transmission bandwidth.

[0095] Figure 4 The structure of a UL slot that can be used in the embodiments of the disclosure is illustrated.

[0096] Referring to Figure 4 , a UL slot can be divided into a control region and a data region in the frequency domain. A PUCCH that carries UCI is allocated to the control region, and a PUSCH that carries user data is allocated to the data region. To maintain single-carrier properties, a UE does not transmit a PUCCH and a PUSCH at the same time. A pair of RBs in a slot is allocated to a PUCCH of the UE. The RBs in the RB pair occupy different subcarriers in two slots. It is thus said that the RB pair frequency-hops over the slot boundary.

[0097] Figure 5 The structure of a DL slot that can be used in the embodiments of the disclosure is illustrated.

[0098] Referring to Figure 5 , the first three OFDM symbols of a DL slot are used as a control region to which control channels are allocated, and the other OFDM symbols of the DL slot are used as a data region to which a PDSCH is allocated. The DL control channels defined for the 3GPP LTE system include a physical control format indicator channel (PCFICH), a PDCCH, and a physical HARQ indicator channel (PHICH).

[0099] The PCFICH is transmitted in the first OFDM symbol of a subframe, carrying information about the number of OFDM symbols (i.e., the size of the control region) used for control channels in the subframe. The PHICH is a response channel for UL transmission, delivering HARQ ACK / NACK signals. Control information carried on the PDCCH is referred to as downlink control information (DCI). The DCI transmits UL resource assignment information, DL resource assignment information, or a UL transmit (Tx) power control command for a UE group.

[0100] 2. New radio access technology system

[0101] As many communication devices require higher communication capacity, necessity for mobile broadband communication greatly improved from existing radio access technologies (RATs) increases. In addition, there is also a need for massive machine-type communications (MTC) capable of providing various services anytime anywhere by connecting many devices or things to each other. Further, a communication system design capable of supporting services / UEs sensitive to reliability and latency has been proposed.

[0102] As a new RAT considering enhanced mobile broadband communication, massive MTC, ultra-reliable and low latency communication (URLLC), etc., a new RAT system has been proposed. In the present disclosure, for convenience of description, the corresponding technology is referred to as a new RAT or new radio (NR).

[0103] 2.1. Numerology

[0104] The NR system to which the present disclosure is applicable supports various OFDM numerologies shown in the following table. In this case, the value of μ and cyclic prefix information per carrier bandwidth part can be signaled in DL and UL, respectively. For example, the value of μ and cyclic prefix information per downlink carrier bandwidth part can be signaled by DL-BWP-mu and DL-MWP-cp corresponding to higher layer signaling. As another example, the value of μ and cyclic prefix information per uplink carrier bandwidth part can be signaled by UL-BWP-mu and UL-MWP-cp corresponding to higher layer signaling.

[0105] [Table 3]

[0106] μ Δf = 2 μ · 15 [kHz]] Cyclic prefix 0 15 Normal 1 30 Normal 2 60 Normal, extended 3 120 Normal 4 240 Normal

[0107] 2.2. Frame structure

[0108] DL and UL transmissions are configured with frames of 10 ms length. Each frame can consist of ten subframes, each of 1 ms length. In this case, the number of consecutive OFDM symbols in each subframe is

[0109] In addition, each subframe can consist of two half-frames of the same size. In this case, the two half-frames consist of subframes 0 to 4 and subframes 5 to 9, respectively.

[0110] Regarding the subcarrier spacing μ, a slot can be similar to Within one subframe, numbering is in ascending order, and can also be similar to Within a frame, numbering is in ascending order. In this case, the number of consecutive OFDM symbols in one slot is The cyclic prefix can be determined according to the following table. The starting slot of one subframe In the time dimension, the starting OFDM symbol of the same subframe Alignment. Table 4 shows the number of OFDM symbols in each time slot / frame / subframe in the case of a normal cyclic prefix, and Table 5 shows the number of OFDM symbols in each time slot / frame / subframe in the case of an extended cyclic prefix.

[0111] [Table 4]

[0112]

[0113] [Table 5]

[0114]

[0115] In the NR system to which the present application is applicable, a self-contained slot structure can be applied based on the above-described slot structure.

[0116] Figure 6 is a diagram showing a self-contained slot structure suitable for the present application.

[0117] In Figure 6 , the shaded area (e.g., symbol index = 0) indicates a downlink control region, and the black area (e.g., symbol index = 13) indicates an uplink control region. The remaining area (e.g., symbol index = 1 to 13) can be used for DL or UL data transmission.

[0118] Based on this structure, the eNB and the UE can sequentially perform DL transmission and UL transmission in one slot. That is, the eNB and the UE can not only transmit and receive DL data but also transmit and receive UL ACK / NACK in response to the DL data in one slot. Therefore, since this structure, the time required before data retransmission in the case where data transmission error occurs can be reduced, thereby minimizing the delay of final data transmission.

[0119] In this self-contained slot structure, a time gap of a predetermined length is required for allowing the eNB and the UE to process switching from a transmission mode to a reception mode, and vice versa. To this end, in the self-contained slot structure, some OFDM symbols at the time of switching from DL to UL are set as a guard period (GP).

[0120] Although it is described that the self-contained slot structure includes both DL and UL control regions, these control regions can be selectively included in the self-contained slot structure. In other words, in addition to both the DL and UL control regions as shown in Figure 6 , the self-contained slot structure according to the present application can include a DL control region or a UL control region.

[0121] In addition, for example, a slot can have various slot formats. In this case, the OFDM symbols in each slot can be divided into downlink symbols (denoted by "D"), flexible symbols (denoted by "X"), and uplink symbols (denoted by "U").

[0122] Thus, the UE can assume that DL transmission occurs only in the symbols denoted by "D" and "X" in the DL slot. Similarly, the UE can assume that UL transmission occurs only in the symbols denoted by "U" and "X" in the UL slot.

[0123] 2.3. Analog beamforming

[0124] In a millimeter wave (mmW) system, since the wavelength is short, a plurality of antenna elements can be installed in the same area. That is, considering that the wavelength at 30 GHz band is 1 cm, in the case of a 2-dimensional array, a total of 100 antenna elements can be installed at an interval of 0.5λ (wavelength) in a 5*5 cm panel. Thus, in the mmW system, the coverage or throughput can be improved by increasing beamforming (BF) gain using a plurality of antenna elements.

[0125] In this case, each antenna element can include a transceiver unit (TXRU) to allow adjustment of the transmission power and phase of each antenna element. By doing so, each antenna element can perform independent beamforming per frequency resource.

[0126] However, it is not cost-effective to install TXRUs in all of the approximately 100 antenna elements. Thus, a method of mapping a plurality of antenna elements to one TXRU and adjusting the beam direction using an analog phase shifter has been considered. However, this method has a disadvantage in that frequency-selective beamforming cannot be performed because only one beam direction is generated over the entire frequency band.

[0127] To solve this problem, as an intermediate form of digital BF and analog BF, a hybrid BF having B TXRUs less than Q antenna elements can be considered. In the case of the hybrid BF, the number of beam directions that can be simultaneously transmitted is limited to B or less depending on how the B TXRUs and the Q antenna elements are connected.

[0128] Figure 7 and Figure 8 are diagrams showing representative methods of connecting TXRUs to antenna elements. Here, the TXRU virtualization model represents the relationship between the TXRU output signal and the antenna element output signal.

[0129] Figure 7 A method of connecting TXRUs to subarrays is shown. In Figure 7 one antenna element is connected to one TXRU.

[0130] Further, Figure 8 A method of connecting all TXRUs to all antenna elements is shown. In Figure 8 all antenna elements are connected to all TXRUs. In this case, as Figure 8The shown configuration has a disadvantage in that it is difficult to implement beamforming focusing, but has an advantage in that all antennas can be configured at low cost.

[0131] In Figure 7 and Figure 8 , W indicates a phase vector weighted by an analog phase shifter. That is, W is a main parameter that determines the direction of analog beamforming. In this case, the mapping relationship between the CSI-RS antenna port and the TXRU can be 1:1 or 1 to many.

[0132] Figure 7 The shown configuration has a disadvantage in that it is difficult to implement beamforming focusing, but has an advantage in that all antennas can be configured at low cost.

[0133] On the contrary, Figure 8 The shown configuration has an advantage in that beamforming focusing can be easily implemented. However, since all antenna elements are connected to the TXRU, it has a disadvantage of high cost.

[0134] When a plurality of antennas is used in an NR system to which the present application is applicable, a hybrid beamforming method obtained by combining digital beamforming and analog beamforming can be applied. In this case, analog (or radio frequency (RF)) beamforming means an operation of performing precoding (or combining) at an RF end. In the case of hybrid beamforming, precoding (or combining) is performed at a baseband end and an RF end, respectively. Accordingly, the hybrid beamforming has an advantage in that similar performance to digital beamforming is secured while reducing the number of RF chains and D / A (digital-to-analog) (or A / D (analog-to-digital)) z-converters.

[0135] For convenience of description, a hybrid beamforming structure can be represented by N transceiver units (TXRU) and M physical antennas. In this case, digital beamforming of L data layers to be transmitted by a transmission end can be represented by an N*L (N x L) matrix. Thereafter, the N converted digital signals are converted into analog signals by the TXRU, and then analog beamforming represented by an M*N (M x N) matrix is applied to the converted signals.

[0136] Figure 9 is a schematic diagram illustrating a hybrid beamforming structure according to an embodiment of the present application from the perspective of TXRU and physical antennas. In Figure 9 , it is assumed that the number of digital beams is L and the number of analog beams is N.

[0137] In addition, in the NR system to which the present application is applied, a method of providing efficient beamforming to a UE located in a specific area by designing an eNB capable of analog beamforming based on symbol change is considered. Further, in the NR system to which the present application is applied, a method of introducing a plurality of antenna panels is also considered, in which independent hybrid beamforming can be applied by defining N TXRUs and M RF antennas as one antenna panel.

[0138] When the eNB uses a plurality of analog beams as described above, each UE has a different analog beam suitable for signal reception. Therefore, in the NR system to which the present application is applied, a beam sweeping operation is considered in which the eNB applies different analog beams per symbol in a specific subframe (SF) (at least with respect to synchronization signals, system information, paging, etc.) and then performs signal transmission in order to allow all UEs to have a reception opportunity.

[0139] Figure 10 FIG. 1 is a diagram schematically illustrating a beam sweeping operation for synchronization signals and system information during a downlink (DL) transmission process according to an embodiment of the present application.

[0140] In Figure 10 In the NR system to which the present application is applied, a physical resource (or channel) for transmitting system information in a broadcast manner is referred to as a physical broadcast channel (xPBCH). In this case, analog beams belonging to different antenna panels can be simultaneously transmitted in one symbol.

[0141] In addition, in the NR system to which the present application is applied, a beam reference signal (BRS) corresponding to a reference signal (RS) applied with a single analog beam (corresponding to a specific antenna panel) has been discussed as a configuration for measuring a channel per analog beam. The BRS can be defined for a plurality of antenna ports, and each BRS antenna port can correspond to a single analog beam. In this case, unlike the BRS, all analog beams in an analog beam group, unlike the BRS, can be applied to a synchronization signal or an xPBCH to help random UEs to correctly receive the synchronization signal or the xPBCH.

[0142] 3. Proposed embodiments

[0143] Now, the configuration proposed by the present application will be described in detail based on the above-described technical idea of the present application.

[0144] Specifically, a method of transmitting a scheduling request (SR) to an eNB by a UE will be described in more detail, through which the UE requests UL data scheduling.

[0145] In a wireless communication system, an eNB (or a network) controls UL data transmission as well as DL data transmission of a UE. For UL data transmission, the eNB (or the network) allocates a physical uplink shared channel (PUSCH) (a physical channel for transmitting UL data) to the UE. Subsequently, the eNB (or the network) can schedule UL data transmission on a specific PUSCH for the UE through a downlink control information (DCI) called an UL grant.

[0146] The eNB (or the network) can not know whether there is UL data (or UL traffic) to be transmitted by the UE. Therefore, a method of requesting UL data scheduling by the UE to the eNB is required.

[0147] To this end, the UE can transmit an UL scheduling request (SR) message (simply referred to as an SR) including UL data traffic, etc. to the eNB (or the network). For example, the UE can transmit the SR on a PUCCH (a physical channel for carrying uplink control information (UCI)). The PUCCH with the SR can be transmitted in time and frequency resources configured by high layer signaling of the eNB (or the network).

[0148] In addition, the NR system to which the present application is applicable can be designed to support multiple logical networks in a single physical system and services (e.g., enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra-reliable and low-latency communication (URLLC), etc.) having various requirements.

[0149] For example, as a physical channel for UCI transmission, the PUCCH can include a PUCCH (hereinafter, referred to as a long PUCCH) including a relatively large number of OFDM symbols (e.g., 4 or more OFDM symbols) and thus supporting a wide UL coverage range and a PUCCH (hereinafter, referred to as a short PUCCH) including a relatively small number of OFDM symbols (e.g., 1 or 2 symbols) and thus supporting low-latency transmission.

[0150] One or more transmission structures can be used for the short PUCCH. For example, when the amount of UCI to be transmitted on the short PUCCH is small (e.g., 1 or 2 bits), the eNB can allocate a set of multiple sequences as a short PUCCH resource to the UE. Then, the UE can select a specific sequence corresponding to the UCI to be transmitted from among the sequences allocated as the short PUCCH resource and transmit the selected sequence. The sequence can be designed to satisfy a low peak-to-average power ratio (PAPR) property. For the convenience of description, the short PUCCH structure based on the sequence will be referred to as a SEQ-PUCCH.

[0151] Further, if the amount of UCI to be transmitted on a short PUCCH is large (e.g., 3 or more bits), the eNB can allocate a short PUCCH resource including resource elements (REs) for UCI transmission and REs for reference signal (RS) transmission to the UE. The RS REs and the UCI REs can be distinguished from each other by frequency division multiplexing (FDM) in respective symbols. The UE can generate encoded bits of the UCI and then transmit modulated symbols of the encoded bits in the UCI REs. For the convenience of description, the short PUCCH structure in which (in respective symbols) RS and UCI are multiplexed by FDM will be referred to as an FDM-PUCCH.

[0152] Now, a method of transmitting an SR by a UE on the above-described short PUCCH and long PUCCH will be described in detail. Although the operation of the present application will be described below as being specifically implemented as UE operation and eNB operation in an NR system, the method proposed by the present application is applicable to a general wireless communication system in the same manner.

[0153] In the present application, a demodulation reference signal (DM-RS) is an RS for data demodulation, a sounding reference signal (SRS) is an RS for UL channel measurement, an acknowledgement / negative acknowledgement (ACK / NACK) is ACK / NACK information about a data decoding result, and channel state information (CSI) is feedback information about a channel measurement result. Further, a cyclic shift (CS) resource for a specific sequence refers to a resource obtained by applying a cyclic time shift (cyclic frequency shift) to a sequence on a time axis (on a frequency axis), and a root index refers to a seed value used to generate a sequence.

[0154] Further, a physical resource block (PRB) can be a frequency domain resource allocation unit in the present application.

[0155] 3.1 1st SR transmission method

[0156] The eNB can configure a (potential) time resource (or a set of slots) for SR transmission for the UE in one of the following methods.

[0157] (1) Configuration according to a preset method

[0158] (2) Configuration through a broadcast channel or system information

[0159] (3) Configuration through (UE-specific) higher layer signaling

[0160] In response to the configuration, the UE can determine whether to actually transmit an SR in the (potential) time resource (or a set of slots) for SR transmission in one or more of the following methods.

[0161] 1) SR transmission without any further check

[0162] The UE can perform this operation only for time resources (or slots) configured by a predetermined method or through a broadcast channel or system information.

[0163] 2) The SR is transmitted only when the SR transmission is allowed on a group common PDCCH (GC-PDCCH) within the time resources (or slots).

[0164] The UE can perform this operation only in time resources (or slots) configured through (UE-specific) higher layer signaling.

[0165] The GC-PDCCH refers to a physical transmission channel carrying DCI directed to a group of multiple UEs.

[0166] The above-described resource allocation and its associated signal transmission method can also be applied to (periodic) SRS transmission in the same manner.

[0167] More specifically, the NR system of the present application can support a slot-based DL or UL data transmission defined on a time axis. In order to support flexible scheduling based on data traffic in the NR system, a method of minimizing the use of a slot carrying only DL data (hereinafter, referred to as a fixed DL slot) or a slot carrying only UL data (hereinafter, referred to as a fixed UL slot) can be applied.

[0168] If (periodic) SR transmission is allowed only in the fixed UL slot, the time resources available for the SR transmission of the UE become relatively small, and the SR transmission period becomes long. This operation can not be preferred in terms of the latency of the UE.

[0169] In order to avoid this problem, in addition to the fixed UL slot, a slot (referred to as a flexible DL / UL slot) whose use can be flexibly switched to DL / UL data transmission can be supported for SR transmission.

[0170] However, if the eNB configures the UE with a set of slots potentially available for SR transmission, the UE can not determine whether the SR transmission is allowed in the flexible DL / UL slot other than the fixed UL slot within the set of potential SR transmission slots.

[0171] Then, the eNB can indicate to the UE through the GC-PDCCH whether the SR transmission is actually allowed in a specific slot of the set of potential SR transmission slots. For example, the eNB can indicate a specific slot structure in the potential SR transmission slot through the GC-PDCCH. In response to the indication, if the indicated slot structure includes a UL control transmission region (available for SR transmission), the UE can determine that the SR transmission is possible in the slot.

[0172] The 1st SR transmission method and other methods proposed by the present application can be applied in combination unless they conflict with each other.

[0173] 3.2. 2nd SR transmission method

[0174] The eNB can configure a set of M sequences for the UE as a transmission resource for SR with M states according to one or more of the following methods.

[0175] (1) SEQ-PUCCH (allocated with M sequences)

[0176] - The sequences for SEQ-PUCCH can be distinguished from each other by time resources / frequency resources / CS resources / root indices.

[0177] (2) Allocate M SRS

[0178] - The SRSs can be distinguished from each other by time resources / frequency resources / CS resources / root indices.

[0179] Thus, the UE can select a sequence corresponding to a state that the UE wants to request among M states of SR, and transmit SR through the selected sequence.

[0180] The M states can not include a negative SR (i.e., a state in which the UE does not request UL scheduling). In other words, the UE can indicate that UL scheduling is not requested by not transmitting SR.

[0181] More specifically, the states of SR can include a state in which the UE requests UL data scheduling (positive SR) and a state in which the UE does not request UL data scheduling (negative SR). The negative SR can be indicated by not transmitting an UL signal at the UE. Thus, from the perspective of information, SR can have one state, positive SR.

[0182] In the NR system according to the embodiment of the present application, the UE can use SEQ-PUCCH to which one sequence is allocated as an UL signal carrying positive SR.

[0183] This feature can be summarized as follows: In the NR system according to the present application, the UE can use SEQ-PUCCH to which M sequences are allocated to transmit SR with M states.

[0184] In addition, if the UE transmits SR, the eNB can need to perform UL channel measurement in order to schedule UL data for the UE. For example, in a method of UL channel measurement, the eNB can indicate to the UE transmission of RS (SRS) for UL channel measurement.

[0185] In terms of latency, a 2-step operation of (separate) SR transmission and SRS transmission at the UE can not be preferred. In this context, SR transmission and SRS transmission of the UE can be combined into one process. That is, the UE can use an SRS resource to transmit an UL signal carrying SR to the eNB.

[0186] For example, if the SR has M states, the eNB can allocate M SRS resources corresponding to the M states. To indicate a specific state of the SR to the eNB, the UE can transmit the SR information to the eNB by transmitting the SRS resource corresponding to the specific state.

[0187] In the case where the UE uses the SRS resource as the SR transmission resource as described above, the UE can advantageously reduce the latency by transmitting the SR and the RS for UL channel estimation at the same time.

[0188] Herein, different amounts of (frequency-axis) resources in the SRS resource can be allocated to the SR states. For example, if each state of the SR information indicates the size of the UL traffic, more frequency-axis resources in the SRS resource can be configured for larger UL traffic.

[0189] In addition, the UE according to the present disclosure can transmit an SR requesting UL scheduling (e.g., a data SR) and an SR requesting beam refinement (e.g., a beam SR). In this case, the data SR and the beam SR can be transmitted in SR transmission resources independently configured for the respective data SR and beam SR, or can be transmitted in a single SR transmission resource the result of jointly encoding the data SR and the beam SR.

[0190] For example, in the case where a positive SR and a negative SR are available for each of the data SR and the beam SR, the UE can transmit the result of joint encoding on a SEQ-PUCCH having 3 states (and 3 sequences corresponding to the 3 states) as shown in [Table 6] below. However, if both the data SR and the beam SR are negative SRs, the UE can not transmit any signal.

[0191] [Table 6]

[0192] Sequence resource Data SR Beam SR SEQ0 Positive SR Positive SR SEQ1 Positive SR Negative SR SEQ2 Negative SR Positive SR

[0193] The above-described operation can also be applied to SRs for different services. For example, an SR for eMBB data (e.g., eMBB-SR) and an SR for URLLC data (e.g., URLLC-SR) can be transmitted in SR transmission resources independently configured for the respective eMBB-SR and URLLC-SR, or can be transmitted in a single SR transmission resource the result of jointly encoding the eMBB-SR and the URLLC-SR. In the case where a positive SR and a negative SR are available for each of the eMBB-SR and the URLLC-SR, the UE can transmit the result of joint encoding on a SEQ-PUCCH having 3 states (and 3 sequences corresponding to the 3 states) similar to [Table 6]. Also in this case, if both the eMBB-SR and the URLLC-SR are negative SRs, the UE can not transmit any signal.

[0194] The 2nd SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0195] 3.3. 3rd SR transmission method

[0196] If the UE is to additionally transmit an SR in a time slot scheduled for PUCCH transmission of UCI (e.g., ACK / NACK and / or CSI), the UE can transmit the SR and / or UCI as follows.

[0197] (1) If the SR transmission resource does not overlap the UCI transmission resource in the time axis (e.g., if the SR and UCI are multiplexed in time division multiplexing (TDM)),

[0198] - Option 1: The SR and UCI are transmitted in their respective transmission resources (Method 1).

[0199] - Option 2: The SR and UCI are transmitted in combination in the UCI transmission resource.

[0200] It is noted herein that the above operation can be applied when the SR transmission resource is adjacent to the UCI transmission resource in the time axis and the transmission power difference between the two transmission resources is equal to or greater than a predetermined value. For example, the above operation can be applied when the SR transmission resource is a sequence and the UCI transmission resource is an FDM-PUCCH transmitted in succession to the SR transmission resource in the time axis.

[0201] (2) If the SR transmission resource overlaps the UCI transmission resource in the time axis (e.g., if the SR and UCI are multiplexed in frequency division multiplexing (FDM) or code division multiplexing (CDM)),

[0202] - Option 1: The SR and UCI are transmitted in their respective transmission resources (Method 2).

[0203] However, if both the SR transmission resource and the UCI transmission resource are sequence resources, different CS / root indices can be configured for the SR sequence and the UCI sequence. For example, the CS / root indices applied to the SR sequence and the UCI sequence can be configured to have a predetermined gap.

[0204] - Option 2: The SR and UCI are transmitted in combination in the UCI transmission resource.

[0205] However, the above operation can be applied when the UE exceeds the (preset) maximum transmission power at which the SR and UCI are transmitted in their respective transmission resources.

[0206] In addition, if the UCI transmission resource is a PUCCH resource with a DM-RS, the SR information can be represented as a sequence multiplexed with the PUCCH DM-RS in CDM.

[0207] In the above configuration, the UCI transmission resource can be configured with different PUCCH transmission structures according to whether the corresponding time slot is a (potential) SR transmission time slot. For example, if the corresponding time slot is a (potential) SR transmission time slot, the UCI transmission resource can be configured as FDM-PUCCH, and if the corresponding time slot is not an SR transmission time slot, the UCI transmission resource can be configured for SEQ-PUCCH.

[0208] When SRS and UCI are transmitted in the same time slot, Method 1 / 2 (SR is replaced by SRS) can be applied, or when SR and SRS are transmitted in the same time slot, Method 1 / 2 (UCI is replaced by SRS) can be applied.

[0209] Figure 11 is a schematic diagram illustrating a 3rd SR transmission method according to an example of the present application.

[0210] More specifically, when SR and UCI (e.g., ACK / NACK or CSI) are transmitted in the same subframe in a conventional LTE system, the SR and UCI are transmitted in combination in a single PUCCH resource.

[0211] However, in an NR system to which the present application is applicable, an SR transmission resource and a UCI transmission resource can be transmitted in TDM in one time slot. Therefore, if the SR transmission resource does not overlap the UCI transmission resource, the basic operation can be to transmit the SR and the UCI in their respective allocated transmission resources.

[0212] However, if the SR transmission resource and the UCI transmission resource are located in adjacent symbols without overlapping and have a large transmission power difference, the UE can transmit the SR and the UCI in combination in a single transmission resource (e.g., short PUCCH).

[0213] For example, it is assumed that the UE transmits the SR in the first of two adjacent OFDM symbols on SEQ-PUCCH (satisfying the low PAPR property) and transmits ACK / NACK on FDM-PUCCH in the second symbol. Compared to SEQ-PUCCH, FDM-PUCCH has a high PAPR, and in order to avoid distortion caused by nonlinearity of a power amplifier (PA), a backoff of transmission power can be applied to FDM-PUCCH. Herein, there can be a transmission power difference between the SR transmission symbol and the ACK / NACK transmission symbol, and signal distortion can occur due to a power transient period in which transmission power changes slowly (rather than quickly).

[0214] As a solution to this problem, if the transmission power difference between the SR transmission resource and the UCI transmission resource adjacent to each other is equal to or greater than a predetermined value, the UE can transmit the SR information in the UCI transmission resource (PUCCH). For example, the UE can transmit information obtained by combining the SR with the ACK / NACK on the FDM-PUCCH allocated for the ACK / NACK transmission in the second symbol.

[0215] Even if the SR transmission resource overlaps with the UCI (e.g., ACK / NACK or CSI) in the time axis, unless the sum of the transmission powers allocated to the respective transmission resources exceeds the maximum transmission power of the UE (i.e., in the case other than the power-limited case), the UE can transmit the SR and the UCI in their respective transmission resources.

[0216] If the SR transmission resource overlaps with the UCI (e.g., ACK / NACK or CSI) transmission resource in the time axis, and this case corresponds to the power-limited case, the UE can transmit the SR and the UCI in combination in the UCI transmission resource. Herein, if the UCI transmission resource is a PUCCH structure with DM-RS, the SR information can be represented by a specific sequence that can be multiplexed with the DM-RS in CDM. In this case, the UE can transmit SR information with M states by selecting one that supports CDM with the PUCCH DM-RS among M sequences and transmitting the selected sequence in the same time / frequency resource.

[0217] The above-described 3rd SR transmission method can be extended to the following overview: the UE can divide the UCI (e.g., SR, CSI, and ACK / NACK) into a plurality of subsets and transmit the plurality of subsets on a plurality of PUCCHs (in the same slot) in the same / different symbols.

[0218] In addition, the UE can apply one of the following methods to a slot in which the SR and the UCI are simultaneously scheduled.

[0219] - Method 1: (corresponding to the SR state) a plurality of PUCCH resources (for UCI transmission) are configured, and the UCI is transmitted in a specific PUCCH resource according to the SR state.

[0220] - Method 2: the SR and the UCI are transmitted in different PUCCH resources (distinguished from each other in TDM / FDM / CDM).

[0221] - Method 3: the SR and the UCI are transmitted in combination in a single PUCCH resource (in particular, the PUCCH format can be different from that for the SR or the UCI only).

[0222] In addition, in case that the UCI transmission PUCCH resource is indicated by the DCI (ACK / NACK resource indicator (ARI) therein), if the PUCCH resource indicated by the DCI (ARI therein) is in different symbols from the PUCCH resource used for the SR transmission (referred to as SR PUCCH resource), the UE can perform Method 2, while if the symbols are the same, the UE can perform Method 1.

[0223] The 3rd SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0224] 3.4. 4th SR transmission method

[0225] If the SR and UCI are transmitted in one PUCCH resource, and the PUCCH resource includes DM-RS, N PUCCH DM-RS candidates (or DM-RS resources) can be configured. The UE can represent SR information with (N-1) states or negative SR by selecting one of the N RS candidates (or DM-RS resources) and transmitting the selected RS candidate (or DM-RS resource).

[0226] Negative SR refers to a state in which the UE does not request UL data scheduling.

[0227] In addition, the multiple DM-RS candidates (or DM-RS resources) can be distinguished from each other by CS / orthogonal cover code (OCC).

[0228] More specifically, if the SR and UCI are transmitted on a single FDM-PUCCH, in which the DM-RS is designed as a constant amplitude zero auto-correlation (CAZAC) sequence, the coded bits of the UCI can be transmitted in the UCI RE of the FDM-PUCCH. SR information with (N-1) states or negative SR can be transmitted by selecting one of the N CS resources (or OCC resources) supported by the PUCCH DM-RS.

[0229] More generally, if RS candidates are configured for the DM-RS within the FDM-PUCCH, the UE can represent SR information by selecting an RS from the RS candidates.

[0230] The 4th SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0231] 3.5. 5th SR transmission method

[0232] When the UE transmits multiple PUCCHs adjacent to each other in the time axis with different transmission powers, the UE can transmit the multiple PUCCHs in one of the following methods.

[0233] (1) Multiple PUCCHs are transmitted with (a single) transmission power level.

[0234] - The (single) transmission power level can be a transmission power level of a PUCCH with a high priority, or a maximum (or minimum) value among transmission power levels of multiple PUCCHs.

[0235] (2) Multiple PUCCHs are transmitted with their respective power levels, each PUCCH being configured with a different power transient period.

[0236] - For a lower priority UCI or a smaller UCI payload size, a longer power transient period can be configured.

[0237] More specifically, when a UE transmits multiple PUCCHs with very different transmission power levels adjacent in a time axis (within the same slot), a power transient period can cause signal distortion. In order to mitigate signal distortion caused by a power transient period, the same transmission power can be applied to multiple PUCCHs transmitted adjacent in a time axis.

[0238] The transmission power equally applied to multiple PUCCHs can be a transmission power level of a PUCCH among the multiple PUCCHs to which UCI with the highest priority is allocated, or a maximum (or minimum) value among transmission power levels allocated to the multiple PUCCHs. Alternatively, the UE can transmit multiple PUCCHs according to their respective allocated transmission power levels, while applying different power transient periods caused by transmission power differences to each PUCCH. For example, a PUCCH with a lower priority UCI can be configured to have a longer power transient period.

[0239] The 5th SR transmission method can be applied to a case where long PUCCHs are multiplexed (adjacent in a time axis) in TDM, in addition to a case where short PUCCHs are multiplexed (adjacent in a time axis) in TDM. Also, in the case where short PUCCHs are multiplexed (adjacent in a time axis) in TDM, if a transmission power difference between two channels is equal to or greater than a predetermined value, the UE can drop a short PUCCH with a lower UCI priority between the two PUCCHs, or can combine UCI scheduled in the short PUCCHs and transmit the combined UCI on one of the two short PUCCHs (or on a third PUCCH). Specifically, in the case where long PUCCHs and short PUCCHs are multiplexed (adjacent in a time axis) in TDM, the UE can match a transmission power level of the short PUCCH to be equal to a transmission power level of the long PUCCH. Alternatively, if the short PUCCH has a higher priority in the above case, the UE can match a transmission power level of the long PUCCH to be equal to a transmission power level of the short PUCCH.

[0240] The above 5th SR transmission method can be summarized as the UE performing one of the following operations in the case where the PUSCH and the PUCCH or the PUCCH are multiplexed (contiguous on a time axis) in TDM.

[0241] 1) Option 1: The power of the channel with lower power is matched to the power of the channel with higher power.

[0242] 2) Option 2: The power of the short channel is matched to the power of the long channel, or a power transient period is configured in the long channel (however, the power within a symbol on the channel configured with the power transient period can not be constant, and the power in a symbol on the channel without the power transient period is maintained constant).

[0243] 3) Option 3: The power of the low-priority channel is matched to the power of the high-priority channel, or a power transient period is configured in the low-priority channel.

[0244] In addition, when the UE transmits a 2-symbol PUCCH, frequency hopping can be applied between the two symbols, or the power difference between the two symbols can be large. In this case, in order to avoid performance degradation caused by a power transient period, the UE can perform the following operations.

[0245] - A time gap is configured between two 1-symbol PUCCHs included in the 2-symbol PUCCH.

[0246] > The time gap can be configured in symbols. For example, the time gap can be set to 1 symbol.

[0247] > In addition, the operation of configuring the time gap can be selectively applied according to a frequency band on which the 2-symbol PUCCH is carried or a subcarrier spacing (SCS) applied to the 2-symbol PUCCH.

[0248] In addition, when two 1-symbol PUCCHs (or SRSs) are transmitted in TDM, the UE can perform the following operations to avoid performance degradation caused by a power transient period caused by turning on / off the 1-symbol PUCCH (or SRS).

[0249] - A time gap is configured between two 1-symbol PUCCHs (or SRSs).

[0250] > The time gap can be configured in symbols. For example, the time gap can be set to 1 symbol.

[0251] > In addition, the operation of configuring the time gap can be selectively applied according to a frequency band on which the 1-symbol PUCCH is carried or a SCS applied to the 1-symbol PUCCH.

[0252] In addition, in case of TDM multiplexing (contiguous in time axis) of two (short) PUCCHs, the UE can apply one of the following options.

[0253] If the coding rate is equal to or higher than a predetermined value after joint encoding in Option 1, the UE can apply one of Options 2 to 4.

[0254] - Option 2: Power transient period is configured in both (short) PUCCHs.

[0255] - Option 3: Power transient period is configured in the lower priority (short) PUCCH.

[0256] - Option 4: Same power is allocated to both (short) PUCCHs (power transient period is not configured).

[0257] - Option 5: One or more of the two (short) PUCCHs is not transmitted (i.e., (short) PUCCH is dropped).

[0258] The 5th SR transmission method and other methods proposed in the present disclosure can be applied in combination unless they conflict with each other.

[0259] 3.6. 6th SR transmission method

[0260] M sequences included in a sequence set S allocated to a SEQ-PUCCH can correspond to M (contiguous) Golay codes in ascending order (or descending order) of CS index. A B M sequences included in a sequence set S allocated to a SEQ-PUCCH can correspond to M (contiguous) Golay codes in ascending order (or descending order) of CS index.

[0261] Sequences in a sequence set for a SEQ-PUCCH can differ in one of time resources, frequency resources, length, CS resources, and root index.

[0262] More specifically, SEQ1, SEQ2, and SEQ3 having time resources T1 and frequency resources F1 and identified by CS indexes 0, 3, and 6, respectively, and SEQ4 having time resources T2 and frequency resources F2 (different from time resources T1 and frequency resources F1) can be allocated to a SEQ-PUCCH. Sequences distinguished from each other by CS resources in the same time and frequency resources can be configured such that the Hamming distance between UCI bits represented by respective sequences is small. 2-bit Golay codes are given as 00, 01, 11, and 10, and can correspond to respective sequences of a SEQ-PUCCH as shown in the following [Table 7].

[0263] [Table 7]

[0264]

[0265] ​More specifically, when multiple sequences are assigned to SEQ-PUCCH, the sequences can be indexed, as long as consecutive indices are assigned to the sequences in the same time and frequency resources (with different CS resources) among the multiple sequences in ascending order (or descending order) of CS indices. Then, the k-th Gray code for N-bit UCI can be transmitted in the sequence with the k-th index in SEQ-PUCCH.

[0266] In particular, when SEQ-PUCCH is transmitted in multiple time resources, if the sequence set per time resource has different CS resources (e.g., CS hopping), different Gray code-sequence mappings can be configured for each time resource, so that adjacent sequences in the CS resources correspond to (contiguous) Gray codes.

[0267] For the principle of mapping between Gray codes and sequences in each time resource, the above-mentioned 6th SR transmission method can be applied.

[0268] Unless conflicting with each other, the 6th SR transmission method and other methods proposed in the present application can be applied in combination.

[0269] 3.7. 7th SR transmission method

[0270] The UE can transmit information combining SR and ACK / NACK on (single) SEQ-PUCCH in one of the following methods.

[0271] - After ACK / NACK is bundled, SR and bundled ACK / NACK are transmitted on (single) SEQ-PUCCH.

[0272] - Sequences are assigned so that the distance between the sequence resources of negative SR and positive SR is maximized (e.g., sequences in different symbols are assigned to negative SR and positive SR), and ACK / NACK is transmitted by assigning resources to ACK / NACK considering Gray coding (e.g., CS spacing).

[0273] More specifically, when SR is divided into positive SR (state requesting UL scheduling) and negative SR (state not requesting UL scheduling), and the payload size of ACK / NACK is 2 bits, the information combining SR and ACK / NACK can be represented as a total of 8 states: {positive SR, 00}, {positive SR, 01}, {positive SR, 10}, {positive SR, 11}, {negative SR, 00}, {negative SR, 01}, {negative SR, 10}, and {negative SR, 11}.

[0274] However, the SEQ-PUCCH mainly handles 1 or 2 bits. In order to allocate resources so that 8 sequences are available for the information, it can be difficult to maintain the structure of the information consistent with the SEQ-PUCCH structure handling 1 or 2 bits (e.g., the frequency resource length can vary). In the above case, the total number of states transmitted through the SEQ-PUCCH can be reduced by ACK / NACK bundling.

[0275] For example, the above 8 states can be reduced to 6 states {positive SR, 0 (bundled ACK / NACK is 00 or 01 or 10)}, {positive SR, 1 (bundled ACK / NACK is 11)}, {negative SR, 00}, {negative SR, 01}, {negative SR, 10}, and {negative SR, 11}, or 4 states {positive SR, 0 (bundled ACK / NACK is 00 or 01 or 10)}, {positive SR, 1 (bundled ACK / NACK is 11)}, {negative SR, 0 (bundled ACK / NACK is 00 or 01 or 10)}, and {negative SR, 1 (bundled ACK / NACK is 11)}.

[0276] Alternatively, when 8 sequences are used, the sequence resources can be allocated in a manner that guarantees orthogonality between sequence resources representing positive SR and sequence resources representing negative SR. For example, assume that there are a total of 8 sequences in the SEQ-PUCCH, and that the 8 sequences include 4 sequences distinguished by CS resources in each of two symbols. The sequences can be allocated so that only positive SR+ACK / NACK information is represented in the first of the two symbols, and only negative SR+ACK / NACK information is represented in the second symbol.

[0277] In addition, the UE can transmit a specific single combination among (all or some) combinations of (e.g., N1*N2 combinations) of (e.g., N1) SR states and (e.g., N2) HARQ-ACK states through M sequence resources (distinguished in the frequency domain and the code domain) in one of the following methods.

[0278] (1) Method #1: Transmit a specific single sequence.

[0279] - Up to M C combinations of SR states and HARQ-ACK states can be represented.

[0280] (2) Method #2: Transmit a specific L sequences (among M sequences).

[0281] - For a given L value, up to M C L combinations of SR states and HARQ-ACK states can be represented.

[0282] When it is said that the sequences are distinguished in the frequency domain and the code domain, it means that the frequency resources and / or the CS or OCC assigned to the sequences distinguish from each other.

[0283] Furthermore, for a certain SR and HARQ-ACK combination, the UE can not transmit any sequence (i.e., represented as Discontinuous Transmission (DTX)).

[0284] Furthermore, the UE can represent a certain one of 8 combinations of SR state (e.g., positive SR or negative SR) and 2-bit HARQ-ACK state (e.g., {ACK, ACK}, {ACK, NACK}, {NACK, ACK}, {NACK, NACK}) by transmitting one or more of four sequences (e.g., Sequence 1, Sequence 2, Sequence 3, and Sequence 4) (i.e., M=4).

[0285] 1) Positive SR + {ACK, ACK}

[0286] - Transmit Sequence 1

[0287] 2) Positive SR + {NACK, NACK} (or just positive SR)

[0288] - Transmit Sequence 2

[0289] 3) Negative SR + {ACK, ACK}

[0290] - Transmit Sequence 3

[0291] 4) Negative SR + {NACK, NACK}

[0292] - Transmit Sequence 4 (however, no signal is transmitted for just negative SR)

[0293] 5) Positive SR + {ACK, NACK} or Positive SR + {NACK, ACK} or Negative SR + {ACK, NACK} or Negative SR + {NACK, ACK}

[0294] 5-1) In the case where multiple sequences can be transmitted at the same time,

[0295] - For each (SR and HARQ-ACK) combination, a certain (single) pair of sequences (i.e., two sequences) is assigned and transmitted among the cases where a pair of sequences is selected from 4 sequences (e.g., Sequence 1 + Sequence 2 or Sequence 1 + Sequence 3 or Sequence 1 + Sequence 4 or Sequence 2 + Sequence 3 or Sequence 2 + Sequence 4 or Sequence 3 + Sequence 4).

[0296] - The UE assigns and transmits different pairs of sequences for different SR and HARQ-ACK combinations.

[0297] 5-2) In the case where only a single sequence can be transmitted (e.g., a power-limited case)

[0298] - For positive SR and {ACK, NACK} (or {NACK, ACK}), sequence 2 is transmitted.

[0299] - For negative SR and {ACK, NACK} (or {NACK, ACK}), sequence 4 is transmitted.

[0300] In case of using only 4 sequences (M=4), sequence 1, sequence 2, sequence 3 and sequence 4 to represent positive or negative SR + 2-bit HARQ-ACK, the UE can transmit the sequences as follows. In the following table, "O" means transmission of the corresponding sequence.

[0301] [1] Case 1: Multiple sequences can be transmitted simultaneously.

[0302] [Table 8]

[0303]

[0304] [2] Case 2: Only a single sequence can be transmitted (e.g., power limited case)

[0305] [Table 9]

[0306]

[0307] Alternatively, the eNB can be configured to transmit the sequences according to Case 1 or Case 2.

[0308] In the above example, for negative SR and DTX, the UE can not transmit any signal.

[0309] However, in the above example, in case of (only) positive SR, the UE can transmit the same sequence (e.g., sequence 2) as for positive SR + {NACK, NACK} to represent (only) positive SR.

[0310] Further, in the above example, the eNB can identify the SR and HARQ-ACK combination based on the detected sequence.

[0311] 1] If only sequence 1 is detected: the SR and HARQ-ACK combination is identified as positive SR + {ACK, ACK}.

[0312] 2] If only sequence 2 is detected: the SR and HARQ-ACK combination is identified as positive SR + {NACK, NACK}.

[0313] 3] If only sequence 3 is detected: the SR and HARQ-ACK combination is identified as negative SR + {ACK, ACK}.

[0314] 4] If only sequence 4 is detected: SR and HARQ-ACK combination is identified as Negative SR + {NACK, NACK}.

[0315] 5] If sequence 1 + sequence 2 is detected: SR and HARQ-ACK combination is identified as Positive SR + {ACK, NACK}.

[0316] 6] If sequence 2 + sequence 3 is detected: SR and HARQ-ACK combination is identified as Positive SR + {NACK, ACK}.

[0317] 7] If sequence 1 + sequence 4 is detected: SR and HARQ-ACK combination is identified as Negative SR + {ACK, NACK}.

[0318] 8] If sequence 3 + sequence 4 is detected: SR and HARQ-ACK combination is identified as Negative SR + {NACK, ACK}.

[0319] If sequence 1 and sequence 3 are transmitted in symbol A and sequence 2 and sequence 4 are transmitted in symbol B (≠ symbol A) in TDM in the above examples, the UE can always operate according to case 1. That is, when the sequences to be simultaneously transmitted are multiplexed in TDM, the power limited case does not occur, so the UE can always perform simultaneous transmission operation.

[0320] The above configuration can be summarized as, if sequence 1 and sequence 3 are transmitted in symbol A and sequence 2 and sequence 4 are transmitted in symbol B (≠ symbol A) in TDM, the UE can represent a specific SR and HARQ-ACK combination by one of the following 8 sequence transmission cases.

[0321] <1> sequence 1

[0322] <2> sequence 2

[0323] <3> sequence 3

[0324] <4> sequence 4

[0325] <5> sequence 1 + sequence 2

[0326] <6> sequence 1 + sequence 4

[0327] <7> sequence 3 + sequence 2

[0328] <8> sequence 3 + sequence 4

[0329] The 8 sequence transmission combinations can be one-to-one mapped to 8 SR and 2-bit HARQ-ACK combinations in total, i.e., Negative SR + {ACK, ACK}, Negative SR + {ACK, NACK}, Negative SR + {NACK, ACK}, Negative SR + {NACK, NACK}, Positive SR + {ACK, ACK}, Positive SR + {ACK, NACK}, Positive SR + {NACK, ACK}, and Positive SR + {NACK, NACK}.

[0330] In a particular example, the 8 sequence transmission combinations can be one-to-one mapped to the SR and 2-bit HARQ-ACK combinations shown in the table corresponding to Case 1.

[0331] Alternatively, if sequence 1 is transmitted in symbol A, and sequence 2, sequence 3, and sequence 4 are transmitted in symbol B (≠ symbol A) in TDM, the UE can indicate a particular SR and HARQ-ACK combination by one of the following 7 sequence transmission cases.

[0332] 1> sequence 1

[0333] 2> sequence 2

[0334] 3> sequence 3

[0335] 4> sequence 4

[0336] 5> sequence 1 + sequence 2

[0337] 6> sequence 1 + sequence 3

[0338] 7> sequence 1 + sequence 4

[0339] The 7 sequence transmission combinations can be one-to-one mapped to 7 SR and 2-bit HARQ-ACK combinations except for Negative SR + {NACK, NACK}, i.e., Negative SR + {ACK, ACK}, Negative SR + {ACK, NACK}, Negative SR + {NACK, ACK}, Positive SR + {ACK, ACK}, Positive SR + {ACK, NACK}, Positive SR + {NACK, ACK}, and Positive SR + {NACK, NACK}.

[0340] Alternatively, six of the seven sequence transmission combinations can be mapped one-to-one to the following 6 SR and 2-bit HARQ-ACK combinations, i.e., Negative SR + {ACK, ACK}, Negative SR + {ACK, NACK}, Negative SR + {NACK, ACK}, Negative SR + {NACK, NACK}, Positive SR + all ACKs (i.e., {ACK, ACK}), Positive SR + bundled NACKs (i.e., {NACK, ACK}, {ACK, NACK}). The remaining one of the seven sequence transmission combinations can correspond to one of the combinations of multiple sequences for transmission (e.g., Sequence 1 + Sequence 2, Sequence 1 + Sequence 3, and Sequence 1 + Sequence 4).

[0341] For example, the UE can transmit the sequences per SR and 2-bit HARQ-ACK combination as follows.

[0342] [Table 10]

[0343]

[0344] In another example, the UE can represent a particular one of the 8 combinations of SR state (e.g., positive SR or negative SR) and 2-bit HARQ-ACK state (e.g., {ACK, ACK}, {ACK, NACK}, {NACK, ACK}, {NACK, NACK}) by transmitting one or more of the 6 sequences (e.g., Sequence 1, Sequence 2, Sequence 3, Sequence 4, Sequence 5, and Sequence 6) (i.e., M = 6).

[0345] (A) Negative SR + {ACK, ACK}

[0346] - Transmit Sequence 1.

[0347] (B) Negative SR + {ACK, NACK}

[0348] - Transmit Sequence 2.

[0349] (C) Negative SR + {NACK, ACK}

[0350] - Transmit Sequence 3.

[0351] (D) Negative SR + {NACK, NACK}

[0352] - Transmit Sequence 4 (no signal is transmitted for negative SR only).

[0353] (E) Positive SR only

[0354] - Transmit Sequence 5.

[0355] (F) Positive SR + {ACK, ACK}

[0356] - Transmit sequence 6.

[0357] (G) Positive SR + {ACK, NACK} or Positive SR + {NACK, ACK} or Positive SR + {NACK, NACK}

[0358] (G-1) In case multiple sequences can be transmitted simultaneously,

[0359] - For each (SR and HARQ-ACK) combination, a specific (single) sequence pair is assigned and transmitted among the cases of selecting a sequence pair (i.e., two sequences) from 6 sequences (e.g., sequence 1 + sequence 2 or sequence 1 + sequence 3 or sequence 1 + sequence 4 or sequence 1 + sequence 5 or sequence 1 + sequence 6 or sequence 2 + sequence 3 or sequence 2 + sequence 4 or sequence 2 + sequence 5 or sequence 2 + sequence 6 or sequence 3 + sequence 4 or sequence 3 + sequence 5 or sequence 3 + sequence 6).

[0360] - The UE assigns and transmits different sequence pairs for different SR and HARQ-ACK combinations.

[0361] G-2) In case only a single sequence can be transmitted (e.g., power limited case),

[0362] - For positive SR and {ACK, NACK} (or {NACK, ACK} or {NACK, NACK}), sequence 5 is transmitted.

[0363] - In case only 6 sequences (M=6), sequence 1, sequence 2, sequence 3, sequence 4, sequence 5 and sequence 6 are used to represent positive or negative SR + 2-bit HARQ-ACK, the UE can transmit the sequences as follows. In the following table, "O" means transmission of the corresponding sequence.

[0364] A) Case 3: Multiple sequences can be transmitted simultaneously.

[0365] [Table 11]

[0366]

[0367] B) Case 4: Only a single sequence can be transmitted (e.g., power limited case).

[0368] [Table 12]

[0369]

[0370] Alternatively, the eNB can be configured to transmit sequences to the UE according to Case 3 or Case 4.

[0371] In the above example for negative SR and DTX, the UE can not transmit any signal.

[0372] Further, in the above example, the eNB can identify the SR and HARQ-ACK combination based on the detected sequence as follows.

[0373] [A] If only sequence 1 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {ACK, ACK}.

[0374] [B] If only sequence 2 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {ACK, NACK}.

[0375] [C] If only sequence 3 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {NACK, ACK}.

[0376] [D] If only sequence 4 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {NACK, NACK}.

[0377] [E] If only sequence 5 is detected, the SR and HARQ-ACK combination is identified as Positive SR + bundled NACK (or DTX).

[0378] [F] If only sequence 6 is detected, the SR and HARQ-ACK combination is identified as Positive SR + {ACK, ACK}.

[0379] [G] If sequence 5 + sequence 2 is detected, the SR and HARQ-ACK combination is identified as Positive SR + {ACK, NACK}.

[0380] [H] If sequence 5 + sequence 3 is detected, the SR and HARQ-ACK combination is identified as Positive SR + {NACK, ACK}.

[0381] [I] If sequence 5 + sequence 4 is detected, the SR and HARQ-ACK combination is identified as Positive SR + {NACK, NACK}.

[0382] In addition, the UE can modify the sequence transmission for Positive SR + {NACK, NACK} and Positive SR + DTX (i.e., Positive SR only) to the sequence transmission shown in [Table 13] or [Table 14] below.

[0383] [Table 13]

[0384]

[0385] [Table 14]

[0386]

[0387] According to [Table 13], the eNB can identify the SR and HARQ-ACK combination based on the detected sequences as follows.

[0388] A] If only sequence 1 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {ACK, ACK}.

[0389] B] If only sequence 2 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {ACK, NACK}.

[0390] C] If only sequence 3 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {NACK, ACK}.

[0391] D] If only sequence 4 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {NACK, NACK}.

[0392] E] If only sequence 5 is detected, the SR and HARQ-ACK combination is identified as Positive SR + {NACK, NACK} (or DTX).

[0393] F] If only sequence 6 is detected, the SR and HARQ-ACK combination is identified as Positive SR + {ACK, ACK}.

[0394] G] If sequence 5 + sequence 2 is detected, the SR and HARQ-ACK combination is identified as Positive SR + {ACK, NACK}.

[0395] H] If sequence 5 + sequence 3 is detected, the SR and HARQ-ACK combination is identified as Positive SR + {NACK, ACK}.

[0396] Alternatively, according to [Table 14], the eNB can identify the SR and HARQ-ACK combination based on the detected sequences as follows.

[0397] If only sequence 1 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {ACK, ACK}.

[0398] If only sequence 2 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {ACK, NACK}.

[0399] <c>If only sequence 3 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {NACK, ACK}.

[0400] <d>If only sequence 4 is detected, the SR and HARQ-ACK combination is identified as Negative SR + {NACK, NACK}.

[0401] <e>If only sequence 5 is detected, the SR and HARQ-ACK combination is identified as positive SR + bundled NACK (or DTX).

[0402] <f>If only sequence 6 is detected, the SR and HARQ-ACK combination is identified as positive SR + {ACK, ACK}.

[0403] <g>If sequence 5 + sequence 2 is detected, the SR and HARQ-ACK combination is identified as positive SR + {ACK, NACK}.

[0404] <h>If sequence 5 + sequence 3 is detected, the SR and HARQ-ACK combination is identified as positive SR + {NACK, ACK}.

[0405] If sequence 5 + sequence 4 is detected, SR and HARQ-ACK combination is identified as positive SR + {NACK, NACK} (or DTX).

[0406] Further, when the UE transmits 1-bit HARQ-ACK and SR, the following sequence allocation can be considered.

[0407] In particular, when the UE uses only 2 sequences (M=2) (e.g., sequence 1 and sequence 2) for (positive or negative) SR + 2-bit HARQ-ACK, the UE can operate as follows.

[0408] A> Case 1: In the case where multiple sequences can be transmitted at the same time,

[0409] The UE can operate according to one of the following tables.

[0410] [Table 15]

[0411] SR HARQ-ACK (1 bit) Sequence 1 Sequence 2 Positive ACK O Positive NACK O O Negative ACK O Negative NACK

[0412] [Table 16]

[0413] SR HARQ-ACK (1 bit) Sequence 1 Sequence 2 Positive ACK O O Positive NACK O Negative ACK O Negative NACK

[0414] [Table 17]

[0415] SR HARQ-ACK (1 bit) Sequence 1 Sequence 2 Positive ACK O Positive NACK O Negative ACK O O Negative NACK

[0416] In the above examples, it is assumed that the UE is always able to transmit multiple sequences. For (only) positive SR, the UE can transmit the same sequence as positive SR + NACK (i.e., sequence 2), and for negative SR + NACK, the UE can not transmit any signal.

[0417] Further, if the UE transmits SR (e.g., positive SR or negative SR) and 2-bit HARQ-ACK in a (2-symbol) SEQ-PUCCH transmission structure, in which the UE selects and transmits one of N sequences in each of the two symbols, the UE can use 8 out of N*N total sequence pairs transmitted in the two symbols to represent 8 SR and 2-bit HARQ-ACK combinations.

[0418] In addition, the UE can use a PUCCH structure (hereinafter, referred to as a SEQ-PUCCH structure) that represents a specific state of M-bit UCI (e.g., HARQ-ACK) by selecting and transmitting one of 2 M sequences for M-bit UCI in each of the two symbols. If the 2 M sequences available for M-bit UCI transmission have the same frequency resources (e.g., PRBs) and are separated by (in the CS domain) 2 M If the individual CSs are distinguished from each other, the PUCCH resource can be represented by a frequency resource index (e.g., a PRB index) of the corresponding frequency resource and a starting CS value. The UE can derive the starting CS value and the spacing between the CSs based on the remaining 2 M -1 CS value. The spacing between the CSs can be determined according to the UCI payload size or based on a value configured by higher layer signaling of the eNB.

[0419] In addition, the eNB can configure the UE with multiple PUCCH resources and then select and indicate a specific PUCCH resource to be used for UCI transmission from among the multiple PUCCH resources through DCI.

[0420] In addition, for SR-only transmission, the UE can operate as follows according to positive SR or negative SR. Specifically, for positive SR only, the UE can transmit a specific single sequence, while for negative SR only, the UE can not transmit a sequence (i.e., on / off keying based on a specific sequence). In addition, for N-bit HARQ-ACK-only transmission, the UE can select a specific single sequence (corresponding to the HARQ-ACK state) from among 2 N sequences and transmit the selected sequence (i.e., PUCCH based on sequence selection). When SR transmission and HARQ-ACK transmission occur in the same time resource, the UE can operate in the following manner.

[0421] A. For positive SR, the operation corresponding to SR-only transmission is performed.

[0422] - i.e., only a specific single sequence allocated for SR transmission is transmitted.

[0423] - In particular, in the above case, the eNB can regard the HARQ-ACK as DTX or ALL NACK.

[0424] B. For negative SR, the operation corresponding to HARQ-ACK-only transmission is performed.

[0425] - i.e., only a specific single sequence (corresponding to the HARQ-ACK state) from among 2 N sequences allocated for HARQ-ACK transmission is transmitted.

[0426] However, if SR transmission and HRAQ-ACK transmission occur in the same time resource and the UE is able to transmit both sequences simultaneously due to a case other than a power-limited situation, the UE can operate as follows.

[0427] C. For positive SR, the operation corresponding to SR-only transmission is performed.

[0428] - a specific single sequence allocated for SR transmission is transmitted.

[0429] - In addition, a specific one of 2 sequences allocated for HARQ-ACK transmission is transmitted (corresponding to the HARQ-ACK state). N

[0430] D. For a negative SR, an operation corresponding to only HARQ-ACK transmission is performed.

[0431] - In addition, a specific one of 2 sequences allocated for HARQ-ACK transmission is transmitted (corresponding to the HARQ-ACK state). N

[0432] The 7th SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0433] 3.8. 8th SR transmission method

[0434] Based on the recognition that an SR is a physical layer signal that a UE transmits to an eNB to indicate whether there is an UL transmission resource request (or UL transmission data), a positive SR indicates that there is an UL transmission resource request (or UL transmission data), and a negative SR indicates that there is no UL transmission resource request (or UL transmission data), the following description is given.

[0435] When a (short) PUCCH resource carrying an SR for a service type A overlaps in a time axis with a PUSCH resource carrying data for a service type B (≠ service type A), the UE can apply one or more of the following methods.

[0436] (1) SR information (e.g., a positive SR or a negative SR) is piggybacked through UCI in (time and frequency) resources allocated to the PUSCH.

[0437] - When the SR is piggybacked with the UCI, the UE can puncture (or rate match) some UL data of the PUSCH, and then (according to a preset RE mapping pattern between the UE and the eNB) transmit (encoded) UCI bits of the (1-bit) SR in specific REs of the PUSCH.

[0438] (2) Puncturing symbols of the PUSCH in a PUCCH resource, and transmitting SR information (e.g., a positive SR or a negative SR) in symbols on the PUCCH.

[0439] - The PUCCH resource carrying the SR information can be used through on / off keying of a specific sequence.

[0440] (3) A method of transmitting SR information (e.g., a positive SR or a negative SR) by switching a PUSCH DM-RS sequence.

[0441] ​​- The PUSCH DM-RS whose sequence is switched according to the SR information can be the PUSCH DM-RS closest to the PUCCH resource allocated for SR transmission (or the earliest PUSCH DM-RS after the PUCCH resource allocated for SR transmission).

[0442] - In addition, when it is said that the sequence of the PUSCH DM-RS is switched, this can mean that the scrambling value or the CS value of the DM-RS is switched.

[0443] (4) The SR (short) PUCCH resource is transmitted only, without performing PUSCH transmission (i.e., PUSCH dropping).

[0444] In the above configuration, the (short) PUCCH resource can have a transmission period of one or two OFDM symbols.

[0445] In addition, the configuration can be identically applied to the (short) PUCCH resource carrying SR and the DM-RS-based (long) PUCCH resource carrying UCI (e.g., HARQ-ACK or CSI) other than SR. In other words, in the configuration, "PUSCH" can be replaced by "DM-RS-based (long) PUCCH", and "PUSCH DM-RS" can be replaced by "PUCCH DM-RS".

[0446] In addition, if the (short) PUCCH carrying SR and the (long) PUSCH carrying UL data are different in frequency resources, and the UE is capable of simultaneously transmitting the PUCCH and the PUSCH in FDM, the UE can simultaneously transmit the (short) PUCCH and the (long) PUSCH.

[0447] In a more specific example, if the SR is transmitted in a sequence selection-based PUCCH resource (e.g., SEQ-PUCCH, i.e., a PUCCH resource that selects and transmits one of a plurality of sequences to thereby represent UCI) within one symbol, and the transmission period of the SR is set to one OFDM symbol, collision can occur between another PUSCH transmission and the SR transmission in a slot. In this case, if the SR and the PUSCH are used for the same service type, the UE can transmit a buffer status report (BSR) or an UL scheduling request through the MAC layer or higher layer information on the PUSCH, without separately transmitting the SR, because the UE has already transmitted the PUSCH.

[0448] On the other hand, if the SR and the PUSCH are used for different service types, there can be different requirements for transmission reliability for the service types. Therefore, the SR and the PUSCH can be preferably transmitted as physical layer signals.

[0449] Therefore, in the case of transmitting SR and PUSCH of different service types, the present application proposes a method of puncturing (or rate matching) some REs or some symbols of the PUSCH and transmitting UCI REs or PUCCH resources carrying SR information in the corresponding resources, or a method of changing the sequence of the PUSCH DM-RS according to the SR information and then transmitting the SR information in the PUSCH DM-RS.

[0450] The 8th SR transmission method and other methods proposed by the present application can be applied in combination unless they conflict with each other.

[0451] 3.9. 9th SR transmission method

[0452] When the SR (short) PUCCH resource overlaps with the (sequence modulation based) (long) PUCCH resource for a specific UCI (e.g., HARQ-ACK or CSI) transmission in the time axis, the UE can apply one or more of the following methods.

[0453] (1) Transmit SR information (e.g., positive SR or negative SR) by switching the sequence transmitted in a specific symbol within the (sequence modulation based) (long) PUCCH resource.

[0454] The specific symbol within the (sequence modulation based) (long) PUCCH resource can be a symbol corresponding to the (time domain) transmission resource of the SR (short) PUCCH resource.

[0455] In addition, switching the sequence transmitted in a specific symbol within the (long) PUCCH resource can correspond to switching the scrambling value or CS value of the sequence.

[0456] (2) Transmit the SR (short) PUCCH resource without transmitting the (sequence modulation based) (long) PUCCH (i.e., PUCCH is dropped).

[0457] The (short) PUCCH resource can have a transmission period spanning one or two OFDM symbols.

[0458] In addition, the (long) PUCCH resource based on sequence modulation refers to a PUCCH resource in which the modulated symbol of the UCI is multiplied by a sequence in each of a plurality of symbols (e.g., 4 or more symbols) for transmission.

[0459] In addition, if the (short) PUCCH carrying the SR and the (long) PUCCH carrying the specific UCI are different in the frequency resource, and the UE is capable of simultaneously transmitting the (short) PUCCH and the (long) PUCCH in FDM, the UE can simultaneously transmit the (short) PUCCH and the (long) PUCCH.

[0460] More specifically, the UE can support a (long) PUCCH based on sequence modulation, which carries a signal obtained by multiplying a certain sequence with a modulated symbol (BPSK or QPSK symbol) of UCI in each of a predetermined number or more of symbols.

[0461] Further, if the SR is transmitted in a sequence selection based PUCCH resource (e.g., SEQ-PUCCH, i.e., a PUCCH resource carrying a selected one of a plurality of sequences thereby representing UCI) within one symbol and has a transmission period set to one OFDM symbol, the PUCCH resource carrying the SR can overlap with a certain transmission symbol of a sequence modulation based (long) PUCCH carrying UCI (other than SR). The UE can represent transmission of SR information in the certain transmission symbol by switching a sequence of the sequence modulation based (long) PUCCH corresponding to the transmission symbol.

[0462] Specifically, if the sequence satisfies a low PAPR, the UE can advantageously transmit additional SR information in a frequency resource already allocated as a sequence modulation based (long) PUCCH resource by transmitting the SR and the (long) PUCCH at different times while maintaining the low PAPR characteristic.

[0463] More specifically, for the above operation, the eNB can configure two or more CS offset values (e.g., CS offset 0 and CS offset 1) for the sequence modulation based (long) PUCCH and indicate whether the SR is to be transmitted in a certain symbol of the sequence modulation based (long) PUCCH to enable the UE to apply different CS offsets. For example, if the eNB indicates SR transmission in a certain symbol of the sequence modulation based (long) PUCCH, the UE can apply CS offset 1 to the sequence in the symbol, whereas if the eNB does not indicate SR information in a certain symbol of the sequence modulation based (long) PUCCH, the UE can apply CS offset 0 to the sequence in the symbol.

[0464] The 9th SR transmission method and other methods proposed by the present application can be applied in combination unless they conflict with each other.

[0465] 3.10. 10th SR transmission method

[0466] Assuming that N HARQ-ACK states are mapped to N sequences in a one-to-one correspondence in each of two (OFDM) symbols, and the UE selects a sequence corresponding to the HARQ-ACK state and transmits the selected sequence. SR information can be represented by changing the one-to-one mapping between the N HARQ-ACK states and the sequences in the first symbol and / or the second symbol.

[0467] For example, when 1-bit HARQ-ACK is transmitted according to the sequence selection scheme for two (OFDM) symbols, two sequences can be mapped to two HARQ-ACK states, ACK and NACK, in a one-to-one correspondence in each symbol as listed in the following table. In [Table 18], sequence 1, sequence 2, sequence 3, and sequence 4 can all be different sequences, or some of sequence 1, sequence 2, sequence 3, and sequence 4 can be the same sequence.

[0468] [Table 18]

[0469] UCI state 1st symbol 2nd symbol ACK Sequence 1 Sequence 3 NACK Sequence 2 Sequence 4

[0470] In particular, when the UE is to represent SR + 1-bit HARQ-ACK information according to the present application, the UE can represent SR information by changing the one-to-one mapping between HARQ-ACK states and sequences in the first symbol and / or the second symbol. The following table shows such an example. In [Table 19] and [Table 20], p-SR and n-SR denote positive SR and negative SR, respectively.

[0471] [Table 19]

[0472] UCI state 1st symbol 2nd symbol ACK (+n-SR) Sequence 1 Sequence 3 NACK (+n-SR) Sequence 2 Sequence 4 ACK (+p-SR) Sequence 2 Sequence 3 NACK (+p-SR) Sequence 1 Sequence 4

[0473] [Table 20]

[0474] UCI state 1st symbol 2nd symbol ACK (+n-SR) Sequence 1 Sequence 3 NACK (+n-SR) Sequence 2 Sequence 4 ACK (+p-SR) Sequence 2 Sequence 3 NACK (+p-SR) Sequence 1 Sequence 4

[0475] In another example, when 2-bit HARQ-ACK is transmitted by the UE in two (OFDM) symbols according to the sequence selection scheme, four sequences can be mapped to four HARQ-ACK states, ACK / ACK, ACK / NACK, NACK / ACK, and NACK / NACK, in a one-to-one correspondence in each symbol as listed in the following table. In [Table 21], sequence 1, sequence 2, …, sequence 8 can all be different sequences, or some of sequence 1, sequence 2, …, sequence 8 can be the same sequence.

[0476] [Table 21]

[0477] UCI state 1st symbol 2nd symbol ACK / ACK Sequence 1 Sequence 5 ACK / NACK Sequence 2 Sequence 6 NACK / ACK Sequence 3 Sequence 7 NACK / NACK Sequence 4 Sequence 8

[0478] In addition, when the UE is to represent SR + 2-bit HARQ-ACK information according to the present application, the UE can represent SR information by changing the one-to-one mapping between HARQ-ACK states and sequences in the first symbol and / or the second symbol. The following table shows such an example. In [Table 22] and [Table 23], p-SR and n-SR denote positive SR and negative SR, respectively.

[0479] [Table 22]

[0480] UCI state 1st symbol 2nd symbol ACK / ACK (+n-SR) Sequence 1 Sequence 5 ACK / NACK (+n-SR) Sequence 2 Sequence 6 NACK / ACK (+n-SR) Sequence 3 Sequence 7 NACK / NACK (+n-SR) Sequence 4 Sequence 8 ACK / ACK (+p-SR) Sequence 1 Sequence 8 ACK / NACK (+p-SR) Sequence 2 Sequence 7 NACK / ACK (+p-SR) Sequence 3 Sequence 6 NACK / NACK (+p-SR) Sequence 4 Sequence 5

[0481] [Table 23]

[0482] UCI state 1st symbol 2nd symbol ACK / ACK (+n-SR) Sequence 1 Sequence 5 ACK / NACK (+n-SR) Sequence 2 Sequence 6 NACK / ACK (+n-SR) Sequence 3 Sequence 7 NACK / NACK (+n-SR) Sequence 4 Sequence 8 ACK / ACK (+p-SR) Sequence 4 Sequence 5 ACK / NACK (+p-SR) Sequence 3 Sequence 6 NACK / ACK (+p-SR) Sequence 2 Sequence 7 NACK / NACK (+p-SR) Sequence 1 Sequence 8

[0483] The above configuration can be summarized as follows. If N sequence pairs to represent N HARQ-ACK states are configured as (sequence X1, sequence Y1), (sequence X2, sequence Y2), …, (sequence XN, sequence YN) in the first symbol and the second symbol, the UE can represent HARQ-ACK+positive SR by N out of N sequence pairs possibly generated from the sequence set {sequence X1, sequence X2, …, sequence XN} and the sequence set {sequence Y1, sequence Y2, …, sequence YN}, and represent HARQ-ACK+negative SR by the other N sequence pairs. N , sequence Y N ), the UE can represent HARQ-ACK+positive SR by N out of N sequence pairs possibly generated from the sequence set {sequence X1, sequence X2, …, sequence XN} and the sequence set {sequence Y1, sequence Y2, …, sequence YN}, and represent HARQ-ACK+negative SR by the other N sequence pairs. N N 2

[0484] The 10th SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0485] 3.11. 11th SR transmission method

[0486] When the UE represents the UCI state of SR and 2-bit HARQ-ACK by selecting one of a plurality of sequences and transmitting the selected sequence, the eNB can indicate to the UE whether a part of the UCI state of SR and 2-bit HARQ-ACK is to be bundled as one state.

[0487] The eNB can indicate bundling or unbundling through higher layer signaling (RRC signaling) and / or DCI.

[0488] In addition, the number of sequences to represent SR and 2-bit HARQ-ACK assumed by the UE can vary depending on bundling or unbundling.

[0489] More specifically, when the UE represents the UCI state of SR and 2-bit HARQ-ACK without bundling according to the sequence selection scheme, the UE can need 8 sequences for a total of 8 UCI states, as shown in the following table.

[0490] [Table 24]

[0491] UCI state Sequence ACK / ACK (+n-SR) Sequence 1 ACK / NACK (+n-SR) Sequence 2 NACK / ACK (+ n-SR) Sequence 3 NACK / NACK (+ n-SR) Sequence 4 ACK / ACK (+ p-SR) Sequence 5 ACK / NACK (+ p-SR) Sequence 6 NACK / ACK (+ p-SR) Sequence 7 NACK / NACK (+ p-SR) Sequence 8

[0492] If the UE uses 8 sequences as listed in the above table, too many sequence resources can be required. Therefore, a method in which the UE bundles some states and represents the bundled states by one sequence can be considered.​​​

[0493] For example, from the perspective of spatial bundling of 2-bit HARQ ACK, the UE can bundle the states with the same HARQ-ACK information and represent the bundled states by one sequence as shown in the following table.

[0494] [Table 25]

[0495]

[0496] If the UE always operates as shown in [Table 24], the resources can be significantly wasted, and if the UE always operates as shown in [Table 25], the resolution of the HARQ-ACK information can be reduced. In this context, the eNB can semi-statically or dynamically configure one of the above two modes according to the PUCCH resource state.

[0497] For example, the eNB can indicate to the UE through RRC signaling and / or DCI whether some UCI states of SR and 2-bit HARQ ACK are to be bundled as one state.

[0498] The 11th SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0499] 3.12. 12th SR transmission method

[0500] The eNB can configure a set of PUCCH resources (for HARQ-ACK transmission) for the UE through higher layer signaling and indicate the PUCCH resource to be applied among the set of PUCCH resources through DCI and / or implicit mapping. The eNB can independently configure the set of PUCCH resources (for HARQ-ACK transmission) in the (micro)slot carrying SR and the (micro)slot without SR.

[0501] In a particular example, since the PUCCH resources for HARQ-ACK transmission coexist with the PUCCH resources for SR transmission in the slot configured to carry SR, the eNB can suffer from a restriction in configuring the set of PUCCH resources for HARQ-ACK transmission.

[0502] On the contrary, there can be more candidates for the PUCCH resources for HARQ-ACK transmission in the slot without carrying SR, which brings more degrees of freedom for the eNB in configuring the set of PUCCH resources.

[0503] In the latter case, for example, the eNB can distribute the set of PUCCH resources across a wider frequency band on the frequency axis, thus facilitating the realization of frequency diversity. Therefore, the eNB can prefer to independently configure the set of PUCCH resources (for HARQ-ACK transmission) in the (micro)slot carrying SR and the (micro)slot without RS.

[0504] The 12th SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0505] 3.13. 13th SR transmission method

[0506] When the eNB indicates a signal transmission to the UE so that the SR (short) PUCCH resource and the (short) PUCCH resource for log2(N) bit (N = 2 or 4) HARQ-ACK transmission (referred to as HARQ-ACK (short) PUCCH resource) partially overlap each other in the time domain resource, the UE can select one of a plurality of sequences and transmit the selected sequence in order to represent the UCI status of the SR and the HARQ-ACK. The eNB can configure the SR (short) PUCCH resource and the (short) PUCCH resource for HARQ-ACK transmission (referred to as HARQ-ACK (short) PUCCH resource) as follows.

[0507] (1) Option 1: A method of allocating four sequences as the SR (short) PUCCH resource and allocating N sequences as the HARQ-ACK (short) PUCCH resource.

[0508] (1-1) Each of the four sequences in the SR (short) PUCCH resource can be a sequence obtained by applying one of four equidistant CS values (from the perspective of the CS index) to a specific (low PAPR / cubic metric (CM)) sequence within a PRB (the same PRB).

[0509] In a specific example, if L CSs are available in a PRB, and the initial CS index allocated to the SR (short) PUCCH resource is k, the CS values corresponding to the four sequences can be set to k, (k+L / 4) mod L, (k+2L / 4) mod L, and (k+3L / 4) mod L in terms of the CS index.

[0510] (1-2) For SR-only transmission, one of the four sequences in the SR (short) PUCCH resource can be used to indicate whether the SR is a positive SR or a negative SR through on / off keying. The sequence resource corresponding to SR-only can be reserved in the SR transmission period.

[0511] In a specific example, the sequence can correspond to the initial CS index allocated to the SR (short) PUCCH resource.

[0512] (1-3) For HARQ-ACK only, the N sequences in the HARQ-ACK (short) PUCCH resource can correspond to N HARQ-ACK states. Then, the UE can select and transmit the sequence corresponding to the HARQ-ACK state to be reported.

[0513] (1-4) When the eNB indicates a signal transmission to the UE such that the SR (short) PUCCH resource and the HARQ-ACK (short) PUCCH resource (partially) overlap each other in the time domain resource, the sequences corresponding to each UCI state can be defined as follows. To represent the corresponding UCI state, the UE can transmit the sequence corresponding to the UCI state.

[0514] (1-2-1) N = 2

[0515] - The two sequences in the SR (short) PUCCH resource can correspond to {positive SR, ACK} and {positive SR, NACK}, respectively.

[0516] - In a particular example, if the initial CS index allocated to the SR (short) PUCCH resource is k, the two sequences can correspond to the CS values of k and (k+L / 2) mod L in terms of the CS index.

[0517] - In addition, the sequence corresponding to {positive SR, NACK} can be the sequence corresponding to only SR.

[0518] - The two sequences in the HARQ-ACK (short) PUCCH resource can correspond to {negative SR, ACK} and {negative SR, NACK}, respectively.

[0519] (1-2-2) N = 4

[0520] - The four sequences in the SR (short) PUCCH resource can correspond to {positive SR, A / A}, {positive SR, A / N}, {positive SR, N / A}, and {positive SR, N / N}, respectively.

[0521] In a particular example, the sequence corresponding to {positive SR, N / N} can be the sequence corresponding to only SR.

[0522] - The four sequences in the HARQ-ACK (short) PUCCH resource can correspond to {negative SR, A / A}, {negative, A / N}, {negative, N / A}, and {negative SR, N / N}, respectively.

[0523] (2) Option 2: A method of allocating two sequences as an SR (short) PUCCH resource and allocating N sequences as a HARQ-ACK (short) PUCCH resource.

[0524] (2-1) Each of the two sequences in the SR (short) PUCCH resource can be a sequence obtained by applying one of two equidistant CS values (from the perspective of the CS index) to a specific (low PAPR / CM) sequence within a PRB (the same PRB).

[0525] In a particular example, when L CSs are available in a PRB, and an initial CS index allocated to an SR (short) PUCCH resource is k, CS values corresponding to two sequences in terms of CS index can be set to k and (k+L / 2) mod L.

[0526] (2-2) For SR-only transmission, one of two sequences in an SR (short) PUCCH resource can be used to indicate whether SR is positive SR or negative SR by on / off keying. A sequence resource corresponding to SR-only can be reserved in an SR transmission period.

[0527] In a particular example, a sequence can correspond to an initial CS index allocated to an SR (short) PUCCH resource.

[0528] (2-3) For HARQ-ACK-only, N sequences in a HARQ-ACK (short) PUCCH resource can correspond to N HARQ-ACK states. Then, a UE can select and transmit a sequence corresponding to a HARQ-ACK state to be reported.

[0529] (2-4) When an eNB indicates a signal transmission to a UE such that an SR (short) PUCCH resource and a HARQ-ACK (short) PUCCH resource (partially) overlap each other in a time domain resource, sequences corresponding to respective UCI states can be defined as follows. To represent a corresponding UCI state, a UE can transmit a sequence corresponding to the UCI state.

[0530] (2-4-1) N=2

[0531] - Two sequences in an SR (short) PUCCH resource can correspond to {positive SR, ACK} and {positive SR, NACK}, respectively.

[0532] - In a particular example, if an initial CS index allocated to an SR (short) PUCCH resource is k, two sequences can correspond to k and (k+L / 2) mod L in terms of CS index.

[0533] - In addition, a sequence corresponding to {positive SR, NACK} can be a sequence corresponding to SR-only.

[0534] - Two sequences in an HARQ-ACK (short) PUCCH resource can correspond to {negative SR, ACK} and {negative SR, NACK}, respectively.

[0535] (2-4-2) N=4

[0536] - Two sequences in an SR (short) PUCCH resource can correspond to {positive SR, A / A} and {positive SR, A / N or N / A or N / N}, respectively.

[0537] - In a particular example, one of the two sequences can correspond to positive SR and NACK as a result of (logical AND-based) ACK / NACK bundling of 2-bit HARQ-ACK. Also, the sequence corresponding to {positive SR, A / N or N / A or N / N} can be the sequence corresponding to SR only.

[0538] The four sequences in the HARQ-ACK (short) PUCCH resources can correspond to {negative SR, A / A}, {negative SR, A / N}, {negative SR, N / A}, and {negative SR, N / N}, respectively.

[0539] (3) Option 3: A method of allocating one sequence as an SR (short) PUCCH resource and (2N-1) sequences as HARQ-ACK (short) PUCCH resources.

[0540] (3-1) One sequence in the SR (short) PUCCH resource can be a CS value corresponding to an initial CS index allocated to the SR (short) PUCCH resource.

[0541] (3-2) For SR-only transmission, a single sequence in the SR (short) PUCCH resource can be used to indicate whether the SR is positive SR or negative SR by on / off keying. The sequence resource corresponding to SR only can be reserved in the SR transmission period.

[0542] (3-3) For HARQ-ACK-only transmission, N of the (2N-1) sequences in the HARQ-ACK (short) PUCCH resources can correspond to N HARQ-ACK states. Then, the UE can select and transmit a sequence corresponding to the HARQ-ACK state to be reported.

[0543] (3-4) When the eNB indicates a signal transmission to the UE such that the SR (short) PUCCH resource and the HARQ-ACK (short) PUCCH resource (partially) overlap each other in time domain resources, the sequences corresponding to respective UCI states can be defined as follows. To represent the corresponding UCI state, the UE can transmit a sequence corresponding to the UCI state.

[0544] (3-4-1) N = 2

[0545] - The single sequence available in the SR (short) PUCCH resource can correspond to {positive SR, NACK}.

[0546] - The three sequences in the HARQ-ACK (short) PUCCH resource can correspond to {positive SR, ACK}, {negative SR, ACK}, and {negative SR, NACK}, respectively.

[0547] (3-4-2) N = 4

[0548] - A single sequence available in the SR (short) PUCCH resource can correspond to {positive SR, N / N}.

[0549] - 7 sequences in the HARQ-ACK (short) PUCCH resource can correspond to {positive SR, A / A}, {positive SR, A / N}, {positive SR, N / A}, {negative SR, A / A}, {negative SR, A / N}, {negative SR, N / A}, and {negative SR, N / N}, respectively.

[0550] (4) Option 4: A method of allocating one sequence as an SR (short) PUCCH resource and 2 N sequences as a HARQ-ACK (short) PUCCH resource.

[0551] (4-1) One sequence in the SR (short) PUCCH resource can be a CS value corresponding to an initial CS index allocated to the SR (short) PUCCH resource.

[0552] (4-2) For SR-only transmission, a single sequence in the SR (short) PUCCH resource can be used to indicate whether the SR is a positive SR or a negative SR by on / off keying. The sequence resource corresponding to the SR-only can be reserved in the SR transmission period.

[0553] (4-3) For HARQ-ACK-only transmission, N sequences out of 2 N sequences in the HARQ-ACK (short) PUCCH resource can correspond to N HARQ-ACK states. Then, the UE can select and transmit a sequence corresponding to the HARQ-ACK state to be reported.

[0554] (4-4) When the eNB indicates a signal transmission to the UE such that the SR (short) PUCCH resource and the HARQ-ACK (short) PUCCH resource (partially) overlap each other in the time domain resource, the sequences corresponding to the respective UCI states can be defined as follows. To represent the corresponding UCI state, the UE can transmit a sequence corresponding to the UCI state.

[0555] (4-4-1) N = 2

[0556] - A specific two sequences in the HARQ-ACK (short) PUCCH resource can correspond to {positive SR, ACK} and {positive SR, NACK}, respectively.

[0557] - The remaining two sequences in the HARQ-ACK (short) PUCCH resource can correspond to {negative SR, ACK} and {negative SR, NACK}, respectively. These two sequences can be used for HARQ-ACK only.

[0558] (4-4-2) N = 4

[0559] The specific four sequences in the HARQ-ACK (short) PUCCH resource can correspond to {positive SR, A / A}, {positive SR, A / N}, {positive SR, N / A}, and {positive SR, N / N}, respectively.

[0560] The remaining four sequences in the HARQ-ACK (short) PUCCH resource can correspond to {negative SR, A / A}, {negative SR, A / N}, {negative SR, N / A}, and {negative SR, N / N}, respectively. The four sequences can be two sequences for HARQ-ACK only.

[0561] In the above description, A / A, A / N, N / A, and N / N denote ACK / ACK, ACK / NACK, NACK / ACK, and NACK / NACK, respectively.

[0562] In the above configuration, the (short) PUCCH resource or sequence corresponding to the UCI status of SR and HARQ-ACK can be transmitted in one or two OFDM symbols. Even though different sequences can actually be transmitted in two symbols according to a specific base sequence hopping or CS hopping, the UCI can be repeatedly transmitted.

[0563] In addition, when N sequences are allocated in the SR (short) PUCCH resource, and indicate only the SR status or the positive SR + specific HARQ-ACK status according to the situation, the mapping relationship between the UCI status and the N sequences can be changed based on the slot and / or symbol (according to a predetermined rule).

[0564] In addition, the HARQ-ACK (short) PUCCH resource includes more than 4 sequence resources, and two or more PRB resources can be configured to include sequence resources. Specifically, if there are 2N sequence resources, each of the two PRBs can include N sequence resources, and each of the N sequence resources in the respective PRB can be a sequence obtained by applying one of N equidistant CS values (from the perspective of the CS index) to a specific (low PAPR / CM) sequence.

[0565] In addition, the CS value can refer to a low PAPR sequence to which a specific CS value is applied.

[0566] More specifically, when the eNB indicates a signal transmission to the UE such that the SR (short) PUCCH resource and the (short) PUCCH resource for 1-bit or 2-bit HARQ-ACK transmission (partially) overlap each other in the time domain resource, the UE can select and transmit one of a plurality of sequences to represent the (joint) UCI status of SR and HARQ-ACK in order to satisfy the single carrier property (or low PAPR / CM property).

[0567] Preferably, the SR (short) PUCCH resource can at least include sequence resources for SR-only transmission. In addition, the HARQ-ACK (short) PUCCH resource should be valid even in the absence of SR request, and thus can at least include sequence resources for negative SR + specific HARQ-ACK state.

[0568] A problem can arise as to which resource among the SR (short) PUCCH resource and the HARQ-ACK (short) PUCCH resource should include sequence resources to represent the positive SR + specific HARQ-ACK state among the (joint) UCI states of SR and HARQ-ACK. This problem can be solved in two methods: one is to include sequence resources in the SR (short) PUCCH resource (Option 1 and Option 2), and the other is to include sequence resources in the HARQ-ACK (short) PUCCH resource (Option 3 and Option 4).

[0569] The above 13th SR transmission method is roughly summarized as follows.

[0570] When the eNB indicates a signal transmission to the UE such that the SR (short) PUCCH resource and the (short) PUCCH resource for log2(N) bit (N=2 or 4) HARQ-ACK transmission (short) PUCCH resource partially overlap each other in the time domain resource, the UE can transmit the (joint) UCI state of SR and HARQ-ACK. The SR (short) PUCCH resource and the HARQ-ACK (short) PUCCH resource can support the transmission of the (joint) UCI state of SR and HARQ-ACK as follows.

[0571] <1> Option A

[0572] <1-1> With the SR (short) PUCCH resource, transmission of the UCI state corresponding to SR only and HARQ-ACK (with positive SR) is supported.

[0573] <1-1-1> SR only can be represented by on / off keying of a (single) PUCCH resource or a (single) sequence configured by a higher layer.

[0574] <1-1-2> SR only and All NACK (with positive SR) can be regarded as the same UCI state.

[0575] <1-1-3> For HARQ-ACK (with positive SR), ACK / NACK bundling (e.g., logical AND operation) can be applied.

[0576] <1-1-4> If the SR (short) PUCCH resource is based on a sequence selection scheme, the UCI state can be represented as follows. In order to represent the UCI state, the UE can then transmit a sequence corresponding to the UCI state.

[0577] <1-1-4-1> Option A-1: SR (short) PUCCH resource is configured with 4 sequences.

[0578] <1-1-4-1-1> N=2

[0579] - The two sequences in the SR (short) PUCCH resource can correspond to {positive SR, ACK} and {positive SR, NACK}, respectively.

[0580] - For example, if the initial CS index allocated to the SR (short) PUCCH resource is k, from the perspective of the CS index, the two sequences can be the CS values corresponding to k and (k+L / 2) mod L in the PRB (same PRB) (L is the maximum number of CSs in the PRB).

[0581] - In addition, the sequence corresponding to {positive SR, NACK} can be the sequence corresponding to SR only.

[0582] (1-1-4-1-2) N=4

[0583] - The four sequences in the SR (short) PUCCH resource can correspond to {positive SR, A / A}, {positive SR, A / N}, {positive SR, N / A}, and {positive SR, N / N}, respectively.

[0584] - For example, the sequence corresponding to {positive SR, N / N} can be the sequence corresponding to SR only.

[0585] <1-1-4-2> Option A-2: SR (short) PUCCH resource is configured with 2 sequences.

[0586] <1-1-4-2-1> N=2

[0587] - The two sequences in the SR (short) PUCCH resource can correspond to {positive SR, ACK} and {positive SR, NACK}, respectively.

[0588] - For example, if the initial CS index allocated to the SR (short) PUCCH resource is k, from the perspective of the CS index, the two sequences can be the CS values corresponding to k and (k+L / 2) mod L in the PRB (same PRB) (L is the maximum number of CSs in the PRB).

[0589] - In addition, the sequence corresponding to {positive SR, NACK} can be the sequence corresponding to SR only.

[0590] - The two sequences in the HARQ-ACK (short) PUCCH resource can correspond to {negative SR, ACK} and {negative SR, NACK}, respectively.

[0591] <1-1-4-2-2> N=4

[0592] - Two sequences in an SR (short) PUCCH resource can correspond to {positive SR, A / A} and {positive SR, A / N or N / A or N / N}, respectively.

[0593] - For example, one of the sequences can correspond to positive SR and NACK as a result of (logical AND-based) ACK / NACK bundling of 2-bit HARQ-ACK.

[0594] - For example, the sequence corresponding to {positive SR, A / N or N / A or N / N} can be the sequence corresponding to SR only.

[0595] - Four sequences in an HARQ-ACK (short) PUCCH resource can correspond to {negative SR, A / A}, {negative SR, A / N}, {negative SR, N / A}, and {negative SR, N / N}, respectively.

[0596] <1-2> Each HARQ-ACK (short) PUCCH resource supports transmission of UCI states corresponding to HARQ-ACK only and HARQ-ACK (with negative SR).

[0597] - Herein, the UCI states of HARQ-ACK only (same ACK / NACK information) and HARQ-ACK (with negative SR) can be considered as the same UCI state.

[0598] <2> Option B

[0599] <2-1> With SR (short) PUCCH resources, transmission of UCI states corresponding to SR only is supported.

[0600] - Herein, SR only can be represented by on / off keying of (single) PUCCH resource or (single) sequence configured by higher layer.

[0601] <2-2> Each HARQ-ACK (short) PUCCH resource supports transmission of UCI states corresponding to HARQ-ACK only, HARQ-ACK (with positive SR), and HARQ-ACK (with negative SR).

[0602] - Herein, the UCI states of HARQ-ACK only (same ACK / NACK information) and HARQ-ACK (with negative SR) can be considered as the same UCI state.

[0603] <3> Option C

[0604] <3-1> With SR (short) PUCCH resources, transmission of UCI states corresponding to SR only is supported.

[0605] - Herein, only SR can be represented by On / Off keying of (single) PUCCH resource or (single) sequence configured by higher layer.

[0606] <3-2> Each HARQ-ACK (short) PUCCH resource supports transmission of UCI state corresponding to only HARQ-ACK and HARQ-ACK (with negative SR).

[0607] - Herein, UCI states of only HARQ-ACK (same ACK / NACK information) and HARQ-ACK (with negative SR) can be considered as the same UCI state.

[0608] <3-3> Transmission of UCI state corresponding to HARQ-ACK (with positive SR) is supported with (specific) (short) PUCCH resource configured separately (with respect to SR / HARQ-ACK PUCCH resource).

[0609] - Herein, (specific) (short) PUCCH resource can be configured in one of the following methods.

[0610] - Option C-1: A single resource is configured per UE.

[0611] - Option C-2: is configured per PUCCH resource set (for HARQ-ACK transmission) configured for the UE.

[0612] - Option C-3: is configured per PUCCH format configured for the UE.

[0613] - Option C-4: is configured per PUCCH resource (for HARQ-ACK transmission) configured for the UE.

[0614] In the above configuration, the transmission resource corresponding to All NACK (with positive SR) can be configured to be the same as or independent of the transmission resource for only SR.

[0615] In addition, the PUCCH resource for HARQ-ACK can be a resource of long PUCCH (e.g., PUCCH having a length of 4 or more symbols) for HARQ-ACK (with up to 2 bits).

[0616] In the above 13th SR transmission method, the PUCCH resource (or PUCCH resource set) for HARQ-ACK transmission and the SR (short) PUCCH resource can be configured by higher layer signaling and / or DCI, and independently of each other.

[0617] The following can be considered additional operations of the 13th SR transmission method. It is assumed herein that one or more PUCCH resource sets for HARQ-ACK transmission are configured for a UE (through higher layer signaling), and one or more PUCCH resources are included in each HARQ-ACK PUCCH resource set, and different PUCCH formats can be used for each HARQ-ACK PUCCH resource.

[0618] 1) Issue 1: Method of configuring positive SR + HARQ-ACK transmission resources in the above case.

[0619] - Option 1-0: Configured per UE.

[0620] - Option 1-1: Configured per HARQ-ACK PUCCH resource set.

[0621] - Option 1-2: One per PUCCH format.

[0622] - Option 1-3: One per HARQ-ACK PUCCH resource.

[0623] - Option 1-4: One per SR PUCCH resource (per SR process or per SR procedure).

[0624] 2) Issue 2: Relationship between positive SR + HARQ-ACK transmission resources and SR-only transmission resources in the above case.

[0625] 2-1) Option 2-1: Among the positive SR + HARQ-ACK transmission resources, the ACK / NACK state uses the resource corresponding to "ALL NACK" as the SR-only transmission resource (shared)

[0626] - Option 2-1 can be combined with Option 1-0.

[0627] - Option 2-1 can be combined with Option 1-1, and additional information indicating the HARQ-ACK PUCCH resource set to which the positive SR + All NACK transmission resource for SR only belongs can be required.

[0628] - Option 2-1 can be combined with Option 1-2, and additional information indicating the PUCCH format configured for the positive SR + All NACK transmission resource for SR only can be required.

[0629] - Option 2-1 can be combined with Option 1-3, and additional information indicating the HARQ-ACK PUCCH resource configured for the positive SR + All NACK transmission resource for SR only can be required.

[0630] - Option 2-1 can be combined with Option 1-4.

[0631] 2-2) Option 2-2: Resources independent of positive SR+HARQ-ACK transmission resource configuration are used as SR-only transmission resources.

[0632] The 13th SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0633] 3.14. 14th SR transmission method

[0634] When the UE represents N (e.g., N=2 or 4) states (e.g., S0, S1, …, SN-1) of HARQ-ACK (with or without SR) by selecting one of N CS indexes in a PRB and transmitting the selected CS index, the eNB can set the initial CS index (i.e., ∈ {0, 1, …, L-1}) as the HARQ-ACK (short) PUCCH resource. In this case, the UE can map the CS to the UCI state in one of the following methods. N-1

[0635] (1) Option 1: a method of mapping the UCI state S k to the CS index (q+k·L / N) mod L (k=0, 1, …, N-1).

[0636] (2) Option 2: for each k (k=0, 1, …, N-1), calculate the CS index (q+k·L / N) mod L, and when the N CS indexes are arranged in ascending order (or descending order) as CS0, CS1, …, CS N-1 , map the UCI state S k to the CS k (k=0, 1, …, N-1).

[0637] L (e.g., 12) denotes the total number of CSs in a PRB.

[0638] More specifically, in the case where N UCI states are represented as N CS indexes in a PRB and the eNB indicates the initial CS index to the UE, the UCI state represented by the UE can correspond to the CS index that is (linearly) increased from the initial CS index in turn.

[0639] Herein, if the value calculated by adding the increment to the initial CS index exceeds the number L of CSs in a PRB, the UCI state can correspond to the value to which the modulo operation of L is further applied.

[0640] ​Alternatively, if the value calculated by adding the delta to the initial CS index exceeds the number L of CSs in the PRB, the UCI state can correspond to a value obtained by taking the CS index that is (linearly) increased from the initial CS index and then reordering the CS indices in ascending or descending order, in sequence.

[0641] The 14th SR transmission method and other methods proposed in the present application can be applied in combination, unless they conflict with each other.

[0642] 3.15. 15th SR transmission method

[0643] When the eNB indicates to the UE a signal transmission such that the SR (short) PUCCH resource (partially) overlaps with the log2(N) bit (N=2 or 4) HARQ-ACK (short) PUCCH resource in the time domain resource, the UE can represent SR related information in X bits (X≥1), add the X bits to the UCI payload, and transmit the UCI payload with the X bits in the HARQ-ACK (short) PUCCH resource.

[0644] The SR related information can include one or more of the following information.

[0645] (1) Information indicating whether the SR is a positive SR or a negative SR

[0646] (2) (Corresponding) SR process index (i.e., information indicating the SR process corresponding to the SR)

[0647] The UE can transmit the SR related information in one of the following methods.

[0648] 1) Only 1 bit of SR is transmitted, indicating a positive SR or a negative SR of the SR (process) with the highest priority.

[0649] 2) X bits of SR are transmitted, where (a) a positive SR or a negative SR per SR (process) is indicated by a bitmap, or (b) only the positive SR information of the SR (SR process) with the highest priority among the SRs with a positive SR.

[0650] - More specifically, if the priority order of SR process #1, SR process #2, and SR process #3 is #1>#2>#3, SR process #1 has a negative SR, SR process #2 has a positive SR, and SR process #3 has a positive SR, the UE can transmit "011" as 3 bits of SR in (a), and the UE can transmit "010" as 3 bits of SR in (b).

[0651] In the above configurations, if SR-related information, X bits, are added to the UCI payload size, the maximum code rate configured for the HARQ-ACK (short) PUCCH resource can be exceeded. Then, the UE can perform one of the following operations. In the following description, A / N can mean HARQ-ACK.

[0652] <1> Option 1: 1-bit SR + A / N bits

[0653] The 1-bit SR can be SR information (e.g., positive SR or negative SR) of an SR process having the highest priority among a plurality (e.g., X) of SR processes.

[0654] <2> Option 2: X-bit SR + bundled A / N bits

[0655] The bundling can be spatial domain A / N bundling.

[0656] <3> Option 3: 1-bit SR + bundled A / N bits

[0657] The UE can immediately perform the operation of Option 3, or if the maximum code rate is exceeded despite Option 1 / 2, can perform the operation of Option 3 as a second step of Option 1 / 2.

[0658] <4> Option 4: Only A / N is transmitted, and all SR transmissions are dropped.

[0659] <5> Option 5: 1-bit (or X-bit) SR + (part of) A / N bits (i.e., some A / N bits are dropped)

[0660] The SR-related information, X bits, can be associated with the process of selecting a HARQ-ACK (short) PUCCH resource set.

[0661] In a certain example, the UE can select one of the PUCCH resource set(s) based on the UCI payload size (during HARQ-ACK transmission), and then the eNB can indicate the specific PUCCH resource actually to be transmitted among the selected PUCCH resource set by DCI. If the UE transmits SR-related information along with HARQ-ACK, the UE can select the PUCCH resource set in one of the following methods.

[0662] 1> Option 1: Select the PUCCH resource set based on the (total) UCI payload size of HARQ-ACK and SR-related information.

[0663] - If any other UCI type (except for HARQ-ACK and SR) is transmitted along with (in the HARQ-ACK (short) PUCCH resource), the (total) UCI payload size can be calculated by reflecting the UCI payload size of the UCI type.

[0664] 2> Option 2: UCI payload size selection of PUCCH resource set based on HARQ-ACK.

[0665] 3> In the above example, the eNB can configure (through higher layer signaling) PUCCH resource set per UCI payload size range for the UE.

[0666] All operations of the above 15th SR transmission method can be extended to the simultaneous transmission of CSI and SR at the UE.

[0667] More specifically, when the SR (short) PUCCH resource collides with the HARQ-ACK (short) PUCCH resource (for HARQ-ACK with more than 2 bits) on the time axis, the UE can transmit X bits of information for the SR in the HARQ-ACK (short) PUCCH resource. Herein, the UE can add the size of the X bits of information to the HARQ-ACK payload size and transmit the encoded bits of the total UCI payload in the HARQ-ACK (short) PUCCH resource.

[0668] In this case, the SR-related X bits can include information about the SR process (or service) for which the SR is used and information indicating whether the SR is present or not.

[0669] The 15th SR transmission method and other methods proposed in the present disclosure can be applied in combination unless they conflict with each other.

[0670] 3.16. 16th SR transmission method

[0671] In the present disclosure, it is assumed that a PUCCH carrying UCI (e.g., HARQ-ACK for a PDSCH scheduled by a DL assignment or CSI) has different PUCCH formats according to the payload size of the UCI and the transmission duration (the number of PUCCH symbols) of the PUCCH.

[0672] (1) PUCCH format 0

[0673] - Supported UCI payload size: up to K bits (e.g., K = 2)

[0674] - Number of OFDM symbols in a single PUCCH: 1 to X symbols (e.g., X = 2)

[0675] - Transmission structure: It includes only a UCI signal without a DM-RS. According to this transmission structure, the UE can transmit a specific UCI state by selecting / transmitting one of a plurality of specific sequences.

[0676] (2) PUCCH format 1

[0677] - Supported UCI payload size: up to K bits

[0678] - Number of OFDM symbols in a single PUCCH: Y to Z symbols (e.g., Y = 4, Z = 14)

[0679] - Transmission structure: DM-RS and UCI are configured / mapped in different symbols in TDM, and for UCI, modulation (e.g., QPSK) symbols are commensurate with a particular sequence. Multiplexing among multiple UEs (in the same RB) can be supported due to application of CS / OCC to both UCI and DM-RS.

[0680] (3) PUCCH Format 2

[0681] - Supported UCI payload size: more than K bits

[0682] - Number of OFDM symbols in a single PUCCH: 1 to X symbols

[0683] - Transmission structure: DM-RS and UCI are configured / mapped in the same symbol in FDM, and prior to transmission, the UE only applies an inverse fast Fourier transform (IFFT) to encoded UCI bits without a discrete Fourier transform (DFT).

[0684] (4) PUCCH Format 3

[0685] - Supported UCI payload size: more than K bits

[0686] - Number of OFDM symbols in a single PUCCH: Y to Z symbols

[0687] - Transmission structure: DM-RS and UCI are configured / mapped in different symbols in TDM, and the UE transmits encoded UCI bits by applying a DFT to the encoded UCI bits. Multiplexing among multiple UEs can be supported due to application of OCC at the front end of the DFT to UCI and application of CS (or IFDM mapping) to DM-RS.

[0688] (5) PUCCH Format 4

[0689] - Supported UCI payload size: more than K bits

[0690] - Number of OFDM symbols in a single PUCCH: Y to Z symbols

[0691] - Transmission structure: DM-RS and UCI are configured / mapped in different symbols in TDM, and the UE transmits encoded UCI bits by applying a DFT to the encoded UCI bits without multiplexing among UEs.

[0692] In the following description, SR refers to a physical layer signal by which a UE requests UL scheduling to an eNB. Specifically, positive SR indicates that the UE requests UL scheduling, and negative SR indicates that the UE does not request UL scheduling.

[0693] The UE can support simultaneous transmission of SR and HARQ-ACK according to a combination of PUCCH formats configured for (only) SR PUCCH resources (hereinafter, referred to as SR PUCCH) and (only) HARQ-ACK PUCCH resources (hereinafter, referred to as A / N PUCCH).

[0694] <1> A / N PUCCH = PUCCH format 0

[0695] <1-1> SR PUCCH = PUCCH format 0

[0696] - Transmit only SR or positive SR + HARQ-ACK on the SR PUCCH. Herein, the SR PUCCH can be configured per SR process.

[0697] - Transmit only HARQ-ACK or negative SR + HARQ-ACK on the A / N PUCCH.

[0698] <1-2> SR PUCCH = PUCCH format 1

[0699] - Transmit only SR on the SR PUCCH.

[0700] - Transmit positive SR + HARQ-ACK in one of the following methods.

[0701] - Option 1: SR transmission is dropped, and only HARQ-ACK is transmitted on the A / N PUCCH.

[0702] - Option 2: Transmit positive SR + HARQ-ACK on the SR PUCCH.

[0703] - Option 3: The UE is separately configured with PUCCH format 0 resources (with respect to the SR PUCCH and / or the A / N PUCCH), and transmits positive SR + HARQ-ACK in the resources. The separate resources can be configured per SR process.

[0704] <1-3> Transmit only HARQ-ACK or negative SR + HARQ-ACK on the A / N PUCCH.

[0705] <2> A / N PUCCH = PUCCH format 1

[0706] <2-1> SR PUCCH = PUCCH format 0

[0707] - Send only SR on SR PUCCH.

[0708] - Send positive SR+HARQ-ACK on A / N PUCCH.

[0709] - Option 1: SR transmission is dropped and only HARQ-ACK is sent on A / N PUCCH.

[0710] - Option 2: Send positive SR+HARQ-ACK on SR PUCCH.

[0711] - Option 3: UE is separately configured PUCCH format 1 resource (with respect to SR PUCCH and / or A / N PUCCH) and sends positive SR+HARQ-ACK in that resource. Separate resource can be configured per SR process.

[0712] - Send only HARQ-ACK or negative SR+HARQ-ACK on A / N PUCCH.

[0713] <2-2> SR PUCCH = PUCCH format 1

[0714] - Send only SR or positive SR+HARQ-ACK on SR PUCCH. SR PUCCH can be configured per SR process.

[0715] - Send only HARQ-ACK or negative SR+HARQ-ACK on A / N PUCCH.

[0716] <3> A / N PUCCH = PUCCH format 2 or 3 or 4

[0717] <3-1> SR PUCCH = PUCCH format 0

[0718] - Send only SR on SR PUCCH.

[0719] - Positive SR+HARQ-ACK is added to UCI payload and sent on A / N PUCCH.

[0720] - Send only HARQ-ACK or negative SR+HARQ-ACK on A / N PUCCH.

[0721] <3-2> SR PUCCH = PUCCH format 1

[0722] - Send only SR on SR PUCCH.

[0723] - Positive SR + HARQ-ACK is added to the UCI payload and transmitted on the A / N PUCCH.

[0724] - Only HARQ-ACK or negative SR + HARQ-ACK is transmitted on the A / N PUCCH. The SR PUCCH can be configured per SR process.

[0725] In the above configurations, one of the options can be selectively applied according to the service type corresponding to the SR.

[0726] More specifically, when there are various transmission types for PUCCH resources or various PUCCH formats (including Format 0 (sequence selection), Format 1 (sequence modulation), and Format 2 / 3 / 4 (coding / modulation)) assumed in the present invention, an efficient method for simultaneous transmission of SR and HARQ-ACK can vary according to the combination of the PUCCH format of the SR PUCCH resource (hereinafter, referred to as SR PUCCH) and the PUCCH format of the HARQ-ACK PUCCH resource (hereinafter, referred to as A / N PUCCH).

[0727] For example, if the SR PUCCH and the A / N PUCCH are the same PUCCH format, it can be efficient for the UE to transmit positive SR + HARQ-ACK on the SR PUCCH (e.g., resource selection). In contrast, if the SR PUCCH and the A / N PUCCH are different PUCCH formats, and the PUCCH format of the A / N PUCCH is one of PUCCH Format 2, PUCCH Format 3, and PUCCH Format 4, it can be more efficient for the UE to transmit positive SR + HARQ-ACK on the A / N PUCCH because the PUCCH format can carry a lot of UCI payload.

[0728] Alternatively, in the case where the PUCCH formats of the SR PUCCH and the A / N PUCCH are the same in terms of their (supported) maximum UCI payload size and different from each other in terms of their transmission duration (on the time axis of the PUCCH resources), it can be preferred in the UL coverage that, if the transmission duration of the SR PUCCH is greater than that of the A / N PUCCH, the UE transmits positive SR + HARQ-ACK on the SR PUCCH, otherwise, the UE (in each SR process) (further) (in addition to the SR PUCCH and / or the A / N PUCCH individually) is configured with a PUCCH resource having the same PUCCH format as the A / N PUCCH resource, and transmits positive SR + HARQ-ACK in the configured resource.

[0729] In addition, if the SR PUCCH is a short PUCCH and the A / N PUCCH is a long PUCCH, the UE can support simultaneous transmission of SR and HARQ-ACK as follows.

[0730] [1] Transmit only SR on the SR PUCCH.

[0731] The SR PUCCH can be configured per SR process.

[0732] [2] Transmit positive SR + HARQ-ACK according to one of the following methods.

[0733] - Option 1: Transmit positive SR + HARQ-ACK SR on the SR PUCCH or a long PUCCH separately configured (per SR process) (with respect to the SR PUCCH and / or A / N PUCCH) according to the service type corresponding to the SR. For example, the UE can transmit a SR with a higher low latency requirement (e.g., URLLC SR) on the SR PUCCH and a SR with a lower low latency requirement (e.g., eMBB SR) on the long PUCCH.

[0734] - Option 2: Transmit positive SR + HARQ-ACK on the SR PUCCH or the A / N PUCCH according to the service type corresponding to the SR. For example, the UE can transmit a SR with a higher low latency requirement (e.g., URLLC SR) on the SR PUCCH and a SR with a lower low latency requirement (e.g., eMBB SR) on the A / N PUCCH.

[0735] [3] Transmit only HARQ-ACK or negative SR + HARQ-ACK on the A / N PUCCH.

[0736] The above configuration can be extended to simultaneous transmission of CSI and SR.

[0737] In addition, the UE can support simultaneous transmission of SR and HARQ-ACK according to a combination of PUCCH formats configured for the (only) SR PUCCH resource (hereinafter, referred to as SR PUCCH) and the (only) HARQ-ACK PUCCH resource (hereinafter, referred to as A / N PUCCH) as follows.

[0738] (A) SR PUCCH = PUCCH format 0

[0739] (A-1) A / N PUCCH = PUCCH format 0

[0740] - Option 1: Transmit positive SR + HARQ-ACK information in a PUCCH resource determined implicitly based on the A / N PUCCH resource. The PUCCH resource (carrying positive SR + HARQ-ACK) can be a PUCCH format 0 resource derived by applying a CS offset (or PRB offset) to the A / N PUCCH resource. Thus, the UE can indicate positive SR by selecting and transmitting a resource (other than the A / N PUCCH resource), and can additionally transmit HARQ-ACK by sequence selection in that resource.

[0741] (A-2) A / N PUCCH = PUCCH format 1

[0742] - Option 1: Transmit positive SR + HARQ-ACK information in a PUCCH resource determined implicitly based on the A / N PUCCH resource. The PUCCH resource (carrying positive SR + HARQ-ACK) can be a PUCCH format 1 resource derived by applying a CS offset (OCC offset or PRB offset) to the A / N PUCCH resource. Thus, the UE can indicate positive SR by selecting and transmitting a resource (other than the A / N PUCCH resource), and can additionally transmit HARQ-ACK by sequence modulation in that resource.

[0743] - Option 2: Transmit positive SR + HARQ-ACK information in an SR PUCCH resource (or a PUCCH resource determined implicitly based on the SR PUCCH resource). The PUCCH resource (carrying positive SR + HARQ-ACK) can be a PUCCH format 0 resource configured as an SR PUCCH resource (or derived by applying a CS offset (or PRB offset) to the SR PUCCH resource). Thus, the UE can indicate positive SR by selecting and transmitting a resource (other than the A / N PUCCH resource), and can additionally transmit HARQ-ACK by sequence selection in that resource.

[0744] - Option 3: SR transmission is dropped, and HARQ-ACK information is transmitted in the A / N PUCCH resource.

[0745] - Option 4: HARQ-ACK transmission is dropped, and SR information is transmitted in the SR PUCCH resource.

[0746] - Option 5: Transmit HARQ-ACK information in the A / N PUCCH resource, and transmit SR information using CS offset (or phase difference) information between DM-RS symbols within the A / N PUCCH. The phase difference between DM-RS symbols in the A / N PUCCH can be applied by multiplying a modulation symbol (e.g., a differential phase shift keying (DPSK) symbol) corresponding to SR information by according to a differential encoding scheme.

[0747] (A-3) A / N PUCCH = PUCCH format 2 or 3 or 4

[0748] - Option 1: SR information is explicitly indicated with bits and included in the UCI payload. Then, positive SR + HARQ-ACK information is transmitted in the A / N PUCCH resource. If the eNB configures multiple SR processes (or configurations) for the UE, the SR information can include information indicating whether there is an SR and the SR process (or configuration) in which the SR exists.

[0749] (B) SR PUCCH = PUCCH format 1

[0750] (B-1) A / N PUCCH = PUCCH format 0

[0751] - Option 1: Positive SR + HARQ-ACK information is transmitted in the PUCCH resource determined implicitly based on the A / N PUCCH resource. The PUCCH resource (carrying positive SR + HARQ-ACK) can be a PUCCH format 0 resource derived by applying a CS offset (or PRB offset) to the A / N PUCCH resource. Thus, the UE can indicate positive SR by selecting and transmitting a resource (other than the A / N PUCCH resource), and can additionally transmit HARQ-ACK by sequence selection in the resource.

[0752] - Option 2: Positive SR + HARQ-ACK information is transmitted in the SR PUCCH resource (or the PUCCH resource determined implicitly based on the SR PUCCH resource). The PUCCH resource (carrying positive SR + HARQ-ACK) can be a PUCCH format 1 resource configured as the SR PUCCH resource (or derived by applying a CS offset (OCC offset or PRB offset) to the SR PUCCH resource). Thus, the UE can indicate positive SR by selecting and transmitting a resource (other than the A / N PUCCH resource), and can additionally transmit HARQ-ACK by sequence modulation in the resource.

[0753] - Option 3: SR transmission is dropped, and HARQ-ACK information is transmitted in the A / N PUCCH resource.

[0754] - Option 4: HARQ-ACK transmission is dropped, and SR information is transmitted in the SR PUCCH resource.

[0755] (B-2) A / N PUCCH = PUCCH format 1

[0756] - Option 1: Transmit positive SR + HARQ-ACK information in the SR PUCCH resource (or PUCCH resource determined based on the SR PUCCH resource implicitly). The PUCCH resource (carrying positive SR + HARQ-ACK) can be a PUCCH format 0 resource configured as the SR PUCCH resource (or derived by applying CS offset (or PRB offset) to the SR PUCCH resource). Thus, the UE can indicate positive SR by selecting and transmitting a resource (other than the A / N PUCCH resource), and can additionally transmit HARQ-ACK in the resource by sequence selection.

[0757] (B-3) A / N PUCCH = PUCCH format 2 or 3 or 4

[0758] - Option 1: Indicate SR information in an explicit bit and include it in the UCI payload. Then, transmit positive SR + HARQ-ACK information in the A / N PUCCH resource. If the eNB configures multiple SR processes (or configurations) for the UE, the SR information can include information indicating whether SR is present and, if SR is present, the SR process (or configuration) in which SR is present.

[0759] In the above configuration, the UE can transmit only SR on the SR PUCCH, and transmit only HARQ-ACK or negative SR + HARQ-ACK on the A / N PUCCH.

[0760] Also in the present application, sequence selection can refer to indicating UCI status by the UE by selecting one of a plurality of sequences and transmitting the selected sequence.

[0761] Also in the present application, sequence modulation can refer to indicating UCI status by the UE by multiplying a modulated (e.g., QPSK) symbol by a specific sequence.

[0762] Also in the present application, an SR process (or configuration) can refer to a time domain / frequency domain / code domain resource configuration for SR transmission (for a specific service). Multiple SR processes (or configurations) can refer to SR information for different services, respectively.

[0763] Also in the present application, deriving another PUCCH resource by applying a CS offset, an OCC offset, or a PRB offset to a specific PUCCH resource can be equivalent to deriving the same PUCCH resource as the specific PUCCH resource, except that the former has a CS index, an OCC index, or a PRB index that differs from that of the latter by a predetermined offset.

[0764] Additionally, when the eNB configures multiple PUCCH resource sets for the UE (through (UE-specific) higher layer signaling), and the UE selects one PUCCH resource set (for UCI transmission) from among the multiple PUCCH resource sets according to the size of the UCI payload, the SR information can be excluded from the UCI payload based on which the PUCCH resource set is selected. For example, the UE can select the PUCCH resource set based on the total UCI payload size of HARQ-ACK and CSI.

[0765] Herein, the UE can select a specific PUCCH resource from the selected PUCCH resource set based on a specific indicator (e.g., ACK / NACK resource indication field) in the additionally received DCI (and information implicitly indicated by the DCI (e.g., control channel element (CCE) index, PDCCH candidate index, etc.)). For example, in the case where the A / N PUCCH resource is PUCCH format 0 (or PUCCH format 1), and transmission of positive SR + HARQ-ACK (up to 2 bits) in a PUCCH resource (of the same PUCCH format) implicitly determined from the A / N PUCCH resource is supported, if the SR information is included in the UCI payload based on which the PUCCH resource set is selected, the UE should determine the positive SR + 2-bit HARQ-ACK as 3 or more bits of UCI payload. Accordingly, the UE can select only the PUCCH resource set configured in PUCCH format 2 / 3 / 4, and thus can not transmit the positive SR + 2-bit HARQ-ACK in PUCCH format 0 (or PUCCH format 1) implicitly determined from the A / N PUCCH resource.

[0766] Alternatively, if there is only 2-bit HARQ-ACK when the UE selects the PUCCH resource set, the UE can exclude the SR information from the PUCCH resource set selection process (i.e., select the PUCCH resource set corresponding to 2 bits), and otherwise, the UE can select the PUCCH resource set based on the size of the UCI payload including all of HARQ-ACK, SR, and CSI.

[0767] Additionally, to support simultaneous transmission of N-bit (1-bit or 2-bit) HARQ-ACK and SR, the eNB can configure a (single) (short) PUCCH resource (hereinafter, referred to as SR PUCCH) of format 0 including M (= 2 or 4) sequences (for a specific SR process). For SR only, the UE can select one of the M sequences and transmit the selected sequence through on / off keying (OOK), and for HARQ-ACK + positive SR, the UE can use 2 N The UE can additionally support the following operations.

[0768] < / h> < / g> < / f> < / e> < / d> < / c> A method of changing the sequence representing the SR only state on SR PUCCH (i.e., changing {+, DTX} to sequence mapping (e.g., randomization) in each slot and / or each symbol (according to a certain pattern)) based on slot and / or based on symbol. Herein, "+" represents positive SR.

[0769] Methods for hopping frequency resources of SR PUCCH based on time slots and / or symbols (according to a specific pattern) (e.g., randomization)

[0770] The frequency resources for the (short) PUCCH can be hopped based on a specific frequency resource granularity (e.g., X (=8 or 16) PRBs). For example, frequency offsets based on slots and / or multiples of X (=8 or 16) PRBs based on symbol changes can be additionally applied to the reference frequency resources. X can be preset between the eNB and the UE, or configured by higher-layer signaling of the eNB (e.g., RRC signaling).

[0771] - Slot-based and / or symbol-based frequency resource hopping may be applied only to (short) PUCCH resources that are semi-statically configured (via higher-layer signaling such as RRC signaling), and not to (short) PUCCH resources that can be dynamically indicated (via higher-layer signaling such as RRC signaling and DCI).

[0772] Unless they conflict with each other, the 16SR transmission method and other methods proposed in this invention can be used in combination.

[0773] 3.17. Transmission Method of the 17th SR

[0774] When the eNB configures multiple SR processes (or configurations) for the UE (where SR transmissions can occur at the same time), the UE can support simultaneous transmission of SR and HARQ-ACK in one or more of the following methods.

[0775] (1) Option 1: The UE derives multiple PUCCH resources corresponding to multiple SR processes (or configurations) from the A / N PUCCH resources according to implicit rules, and sends positive SR+HARQ-ACK information in the PUCCH resource (derived from the A / N PUCCH resources) corresponding to a single SR process (or configuration).

[0776] The UE can indicate a positive SR for a specific SR process (or configuration) by selecting one of a number of PUCCH resources and sending the selected PUCCH resource, and can also send a HARQ-ACK in that resource.

[0777] Implicit rules can be derived by applying CS offset, OCC offset, or PRB offset to A / N PUCCH resources to deduce a scheme for multiple PUCCH resources corresponding to multiple SR processes (or configurations).

[0778] (2) Option 2: The eNB configures an SR PUCCH for each of the multiple SR processes (or configurations), and the UE sends an affirmative SR+HARQ-ACK in the SR PUCCH resource corresponding to the individual SR process (or configuration).

[0779] The UE can indicate a positive SR for a specific SR process (or configuration) by selecting a specific SR PUCCH resource and transmitting the selected SR PUCCH resource, and can additionally transmit HARQ-ACK in the resource.

[0780] The above operation can be applied only when the SR PUCCH resource is of a specific format (e.g., PUCCH format 1).

[0781] (3) Option 3: A method of configuring multi-bit SR information for a plurality of SR processes (or configurations) and transmitting multi-bit SR+HARQ-ACK information in an A / N PUCCH resource by including the multi-bit SR information in a UCI payload during HARQ-ACK transmission.

[0782] The multi-bit SR can include positive / negative SR and information indicating an SR process (or configuration) in which the SR exists, and / or positive / negative SR information for each of all or some of the plurality of SR processes (or configurations).

[0783] The eNB can configure the UE to report whether at least one SR process (or configuration) has a positive SR (at the same point in time) or a plurality of SR processes (or configurations) all have a negative SR, or to report multi-bit SR information for a plurality of SR processes (or configurations), through (UE-specific) higher layer signaling (e.g., RRC signaling).

[0784] In the case where the eNB configures a plurality of PUCCH resource sets for the UE (through (UE-specific) higher layer signaling) and the UE selects one of the PUCCH resource sets according to a UCI payload size, the multi-bit SR information can be included in a UCI payload based on which the PUCCH resource set is selected (when the eNB configures multi-bit SR transmission).

[0785] In the present invention, a PUCCH resource indicating (only) HARQ-ACK transmission can be referred to as an A / N PUCCH resource, and a PUCCH resource indicating (only) SR transmission can be referred to as an SR PUCCH resource.

[0786] In addition, in the present invention, SR PUCCH and A / N PUCCH can respectively refer to a PUCCH resource configured for only SR transmission and a PUCCH resource configured for only HARQ-ACK transmission. The UE can transmit only SR on the SR PUCCH and transmit only HARQ-ACK or negative SR+HARQ-ACK on the A / N PUCCH.

[0787] Further in the present invention, an SR process (or configuration) can refer to a time domain / frequency domain / code domain resource configuration for SR transmission (for a specific service). Multiple SR processes (or configurations) can refer to SR information for different services.

[0788] Further, deriving another PUCCH resource by applying a CS offset, an OCC offset, or a PRB offset to a specific PUCCH resource can be equivalent to deriving the same PUCCH resource as the specific PUCCH resource, except that the former has a CS index, an OCC index, or a PRB index that differs from the latter by a predetermined offset.

[0789] More specifically, in case that the UE transmits SR and HARQ-ACK simultaneously, if the PUCCH resource configured for SR only is PUCCH format 0, the UE can transmit positive SR+HARQ-ACK information in the PUCCH resource derived from the A / N PUCCH resource, and if the PUCCH resource configured for SR only is PUCCH format 1, the UE can transmit positive SR+HARQ-ACK information in the SR PUCCH resource.

[0790] When the eNB configures multiple SR processes (or configurations), the UE can additionally report the SR process (or configuration) with positive SR and the positive SR information to the eNB, thereby reducing the UL scheduling latency of the eNB. For example, if the UE reports only the positive / negative SR information to the eNB without additional information on the SR process with positive SR, the eNB can know the service type corresponding to the positive SR only after receiving the BSR after the SR transmission. As a result, the UL scheduling can be delayed.

[0791] Accordingly, the UE according to the present invention can additionally indicate the SR process (or configuration) with positive SR and the positive / negative SR information.

[0792] Specifically, in case that the UE transmits positive SR+HARQ-ACK information in the PUCCH resource derived from the A / N PUCCH resource, the UE can derive multiple PUCCH resources corresponding to multiple SR processes (or configurations) by applying a CS offset, an OCC offset, or a PRB offset to the A / N PUCCH, and transmit positive SR+HARQ-ACK information in a specific one of the multiple PUCCH resources.

[0793] Alternatively, when the UE transmits positive SR+HARQ-ACK information in an SR PUCCH resource, an SR PUCCH resource can be preset for each of a plurality of SR processes (or configurations). Then, the UE can transmit positive SR+HARQ-ACK information in a specific one of a plurality of PUCCH resources. Herein, the UE can indicate a positive SR for a specific SR process (or configuration) by selecting a specific one of a plurality of PUCCH resources (corresponding to a plurality of SR processes (or configurations)) and additionally transmit HARQ-ACK in the selected resource.

[0794] In another method, if the eNB configures a plurality of SR processes (or configurations) for the UE, the UE can transmit multi-bit SR+HARQ-ACK in an A / N PUCCH resource by adding multi-bit SR information to a UCI payload, the multi-bit SR information including positive / negative SR and information about SR processes (or configurations) in which SR exists, or positive / negative SR information for each of all or some of a plurality of SR processes (or configurations).

[0795] The 17th SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0796] 3.18. 18th SR transmission method

[0797] When different UCI types of PUCCHs (e.g., A / N PUCCH, SR PUCCH, and CSI PUCCH) to be transmitted by the UE overlap each other only in some symbols (e.g., partially overlap) in a time axis, the UE can transmit a PUCCH (in a single PUCCH resource) to the eNB through UCI multiplexing.

[0798] In the present application, a PUCCH resource configured for transmission of only a UCI type having the highest priority among UCI types (hereinafter, referred to as UCI A) is referred to as PUCCH A, and a PUCCH resource selected under the assumption that the UE performs UCI multiplexing for a specific UCI type set S is referred to as PUCCH B. In an initial state, the UCI type set S includes all UCI types, and the PUCCH B can be a PUCCH resource under the assumption of UCI multiplexing of all UCI types.

[0799] (1) PUCCH A = PUCCH B

[0800] - For the UCI type of the set S, the UE performs UCI multiplexing for the UCI type indicating UL transmission at or before a time point that is a certain time before the (minimum) UL timing (or UE processing time) corresponding to the corresponding UCI type (or PUCCH) with respect to the transmission time of PUCCH A (included in the set S), and excludes other UCI types (excluded from the set S) from the UCI multiplexing.

[0801] For example, if the PUCCH B is changed, the UE repeatedly performs the 18th SR transmission method for the changed set S and PUCCH B.

[0802] In another example, if the PUCCH B is not changed, the UE transmits UCI multiplexing information on the UCI type of the set S on the PUCCH B.

[0803] (2) PUCCH A ≠ PUCCH B

[0804] (2-1) In the case where the transmission time with respect to PUCCH B is at or before a time point that is a certain time before the (minimum) UL timing (or UE processing time) corresponding to UCI A (or PUCCH A) for UCI A (or PUCCH A) indicating UL transmission,

[0805] - For the UCI type of the set S, the UE performs UCI multiplexing for the UCI type indicating UL transmission at or before a time point that is a certain time before the (minimum) UL timing (or UE processing time) corresponding to the corresponding UCI type (or PUCCH) with respect to the transmission time of PUCCH B (included in the set S), and excludes other UCI types (excluded from the set S) from the UCI multiplexing.

[0806] For example, if the PUCCH B is changed, the UE repeatedly performs the 18th SR transmission method for the changed set S and PUCCH B.

[0807] In another example, if the PUCCH B is not changed, the UE transmits UCI multiplexing information on the UCI type of the set S on the PUCCH B.

[0808] (2-2) In the case where the transmission time with respect to PUCCH B is at or before a time point that is a certain time before the (minimum) UL timing (or UE processing time) corresponding to UCI A (or PUCCH A) for UCI A (or PUCCH A) indicating UL transmission, the UE can detect a new set S and a new PUCCH B satisfying the following conditions.

[0809] - Condition: UL transmission is indicated for UCI A (or PUCCH A) at a time point and before a transmission time of PUCCH B, which is a certain time before a (minimum) UL timing (or UE processing time) corresponding to UCI A (or PUCCH A).

[0810] - The minimum set of UCI types subject to UCI multiplexing that satisfies the above condition is only UCI A, and PUCCH B = PUCCH A.

[0811] - The UE can perform a detection process to exclude UCI types in order based on the priority of the UCI types.

[0812] Then, the UE can apply (2-1) of the 18th SR transmission method based on the new set S and PUCCH B.

[0813] In the present invention, SR PUCCH, A / N PUCCH, and CSI PUCCH respectively refer to resources configured for only SR transmission, only HARQ-ACK transmission, and only CSI transmission.

[0814] Further in the present invention, assuming that the priority order of UCI types is HARQ-ACK > CSI > SR, a UCI type with an earlier PUCCH transmission time has a higher priority, or if UL transmission is indicated later for a UCI type, the UCI type has a higher priority.

[0815] Further, when determining the PUCCH B resource, the PUCCH B resource can be determined only according to the combination of UCI types to be multiplexed with UCI, regardless of the UL timing information.

[0816] In a specific example, if the SR PUCCH overlaps with the A / N PUCCH only in some symbols in the time axis, the UE can operate as follows, assuming that the priority order of the SR PUCCH and the A / N PUCCH is A / N PUCCH > SR PUCCH (or HARQ-ACK > SR).

[0817] 1) When a positive SR is generated within a predetermined previous time period corresponding to the (minimum) UL timing (or UE processing time) with respect to the A / N PUCCH transmission time, the UE can transmit only the HARQ-ACK, discarding the SR transmission.

[0818] 2) When a positive SR is generated within a predetermined time period corresponding to (minimum) UL timing (or UE processing time) with respect to A / N PUCCH transmission time, the UE transmits information of UCI multiplexing of SR and HARQ-ACK. Herein, the UE can transmit information of UCI multiplexing of SR and HARQ-ACK (e.g., positive SR + HARQ-ACK) according to the above-described 16th SR transmission method.

[0819] According to this method, if multiple PUCCH transmissions of multiple UCI types are indicated to the UE to overlap each other in at least some symbols, and the UE is capable of transmitting all or part of UCI of multiple UCI types through UCI multiplexing, transmission of the highest priority UCI type (UCI A) among the multiple UCI types can always be guaranteed, and UCI multiplexing between UCI types prepared in terms of UL timing (or UE processing time) can be supported as much as possible.

[0820] In addition, if multiple PUCCHs having different starting symbols and / or different transmission durations partially overlap each other in some time resources (case 1), and if PUCCH and PUSCH having different starting symbols and / or different transmission durations partially overlap each other in some time resources (case 2), the UE can operate as follows in each case. Herein, in case 1 and case 2, at least one PUCCH can be a PUCCH for HARQ-ACK transmission.

[0821] <1> Case 1

[0822] <1-1> In case the UE processing time (or UL timing) for HARQ-ACK transmission is sufficient,

[0823] - Multiple pieces of UCI configured to be transmitted in multiple PUCCH resources are transmitted in a selected single PUCCH resource (from among the multiple PUCCH resources) through UCI multiplexing according to a predetermined scheme (according to the combination of UCI types of the multiple pieces of UCI).

[0824] <1-2> In case the UE processing time (or UL timing) for HARQ-ACK transmission is insufficient,

[0825] - Only a single PUCCH having the highest priority among the multiple PUCCH resources is transmitted, and the transmission of the other PUCCHs is discarded.

[0826] <2> Case 2

[0827] <2-1> In case the UE processing time (or UL timing) for HARQ-ACK transmission is sufficient,

[0828] - UCI (e.g., HARQ-ACK) piggybacked to PUSCH transmission on PUCCH.

[0829] <2-2> In case of insufficient UE processing time (or UL timing) for HARQ-ACK transmission,

[0830] - PUCCH is transmitted, while PUSCH transmission is dropped.

[0831] Alternatively, the UE can rate-match or puncture the PUCCH or PUSCH in some symbols where the PUCCHs or the PUSCH and PUCCH overlap.

[0832] In addition, when different UCI types of PUCCHs (e.g., A / N PUCCH, SR PUCCH, and CSI PUCCH) to be transmitted by the UE overlap each other only in some symbols (e.g., partially overlap) on the time axis, the UE can transmit the PUCCHs (in a single PUCCH resource) to the eNB through UCI multiplexing.

[0833] In the present invention, SR PUCCH, A / N PUCCH, and CSI PUCCH respectively mean PUCCH resources configured and / or indicated for (only) SR transmission, (only) HARQ-ACK transmission, and (only) CSI transmission.

[0834] Further in the present invention, PF0, PF1, PF2, PF3, and PF4 respectively mean PUCCH format 0, PUCCH format 1, PUCCH format 2, PUCCH format 3, and PUCCH format 4.

[0835] Further in the present invention, PF X / Y means PF X or PF Y.

[0836] Further in the present invention, when it is said that a positive SR is generated, it can mean that UL data to be transmitted by the UE is generated or the UE determines to request UL scheduling.

[0837] 1> Case 1: A / N PUCCH overlaps with SR PUCCH

[0838] 1-1> If the A / N PUCCH is PF2 / 3 / 4 and the SR PUCCH is PF0 / 1,

[0839] - UCI including HARQ-ACK bits and explicit SR bits is transmitted on the A / N PUCCH.

[0840] - The explicit SR bits can include the following information with respect to the A / N PUCCH transmission (start) time T.

[0841] - When generating positive SR at or before time T-T0, the explicit SR bit indicates positive SR information.

[0842] - When generating positive SR after time T-T0 (until time T), the explicit SR bit indicates negative SR information.

[0843] - If no positive SR is generated until time T, the explicit SR bit indicates negative SR information.

[0844] 1-2> A / N PUCCH is PF0 and SR PUCCH is PF0.

[0845] - Based on A / N PUCCH transmission (starting) time T

[0846] - When generating positive SR at and before time T-T0, the UE transmits HARQ-ACK information in the PF0 resource (obtained from A / N PUCCH). This PF0 resource can be obtained by applying a PRB index offset and / or a CS index offset and / or an OCC index offset to the A / N PUCCH resource (e.g., PF0 resource).

[0847] - When generating positive SR after time T-T0, the UE can transmit (only) HARQ-ACK on A / N PUCCH, discarding SR transmission.

[0848] - If no positive SR is generated until time T, the UE transmits (only) HARQ-ACK information on A / N PUCCH.

[0849] 1-3> A / N PUCCH is PF0 and SR PUCCH is PF1.

[0850] 1-3-1> Option 1: Based on A / N PUCCH transmission (starting) time T

[0851] - When generating positive SR at and before time T-T0, the UE transmits HARQ-ACK information in the PF0 resource (obtained from A / N PUCCH). This PF0 resource can be obtained by applying a PRB index offset and / or a CS index offset and / or an OCC index offset to the A / N PUCCH resource (e.g., PF0 resource).

[0852] - When generating positive SR after time T-T0, the UE can transmit (only) HARQ-ACK on A / N PUCCH, discarding SR transmission.

[0853] - If no positive SR is generated until time T, the UE transmits (only) HARQ-ACK information on A / N PUCCH.

[0854] 1-3-2> Option 2: Based on SR PUCCH transmission (starting) time T

[0855] - In case of HARQ-ACK transmission indicated at and before time T-T0.

[0856] - For HARQ-ACK+negative SR (or HARQ-ACK only), the UE transmits HARQ-ACK information on A / N PUCCH.

[0857] - For HARQ-ACK+positive SR, the UE transmits HARQ-ACK information on SR PUCCH. The HARQ-ACK information can be transmitted by multiplying (all or some) UCI sequences in SR PUCCH by a specific QPSK modulation symbol.

[0858] - If HARQ-ACK transmission is indicated after time T-T0, the UE transmits (only) HARQ-ACK on A / N PUCCH, while discarding SR transmission.

[0859] 1-4> In case of A / N PUCCH being PF1 and SR PUCCH being PF0, based on A / N PUCCH transmission (starting) time T,

[0860] 1-4-1> When positive SR is generated at and before time T-T0,

[0861] - Option 1: (Only) HARQ-ACK is transmitted on A / N PUCCH, while SR transmission is discarded.

[0862] - Option 2: HARQ-ACK information is transmitted in PF1 resource. The PF1 resource can be obtained by applying PRB index offset and / or CS index offset and / or OCC index offset to A / N PUCCH (e.g., PF1 resource).

[0863] - Option 3: HARQ-ACK information is transmitted on A / N PUCCH, and SR information is transmitted by changing specific sequence or DM-RS sequence in A / N PUCCH or multiplying DM-RS by DPSK modulation symbol. The UE can change UCI sequence or DM-RS sequence by changing base sequence or CS.

[0864] 1-4-2> When positive SR is generated after time T-T0, the UE can transmit (only) HARQ-ACK on A / N PUCCH, while discarding SR transmission.

[0865] 1-4-3> If no positive SR is generated until time T, the UE transmits (only) HARQ-ACK information on A / N PUCCH.

[0866] 1-5> A / N PUCCH is PF1 and SR PUCCH is PF1.

[0867] 1-5-1> Based on A / N PUCCH transmission (starting) time T,

[0868] 1-5-1-1> When generating positive SR at and before time T-T0,

[0869] - Option 1: Send (only) HARQ-ACK on A / N PUCCH, while SR transmission is dropped.

[0870] - Option 2: Send HARQ-ACK information in PF1 resource. This PF1 resource can be obtained by applying PRB index offset and / or CS index offset and / or OCC index offset to A / N PUCCH (e.g., PF1 resource).

[0871] - Option 3: Send HARQ-ACK information on A / N PUCCH, and SR information is sent by changing a specific sequence or DM-RS sequence in A / N PUCCH or multiplying DM-RS by DPSK modulation symbol. The UE can change the UCI sequence or DM-RS sequence by changing the base sequence or CS.

[0872] - Option 4: Send HARQ-ACK information on SR PUCCH. Here, HARQ-ACK information can be sent by multiplying the UCI sequence in the SR PUCCH carrying HARQ-ACK information by a specific QPSK modulation symbol. In addition, the operation of Option 4 can be applied only when the transmission time of SR PUCCH is later than or the same as the transmission time of A / N PUCCH (or the SR PUCCH transmission duration is included in the A / N PUCCH transmission duration). Otherwise, the UE can send (only) HARQ-ACK information on A / N PUCCH, while dropping SR transmission.

[0873] 1-5-1-2> When generating positive SR after time T-T0, the UE can send (only) HARQ-ACK on A / N PUCCH, while dropping SR transmission.

[0874] 1-5-1-3> If no positive SR is generated until time T, the UE sends (only) HARQ-ACK information on A / N PUCCH.

[0875] 1-5-2> Option 2: Based on SR PUCCH transmission (starting) time T,

[0876] 1-5-2-1> If the HARQ-ACK transmission is indicated at and before time T-T0,

[0877] 1-5-2-1-1> For HARQ-ACK + negative SR (or HARQ-ACK only), the UE transmits the HARQ-ACK information on the A / N PUCCH.

[0878] 1-5-2-1-2> For HARQ-ACK + positive SR, the UE transmits the HARQ-ACK information on the SR PUCCH. Herein, the HARQ-ACK information can be transmitted by multiplying (all or some) UCI sequences in the SR PUCCH carrying the HARQ-ACK information by a specific QPSK modulation symbol.

[0879] In addition, if the (transmission) ending time of the SR PUCCH is later than the (transmission) ending time of the A / N PUCCH by a specific time T d , the UE can transmit (only) HARQ-ACK on the A / N PUCCH, discarding the SR transmission. The time T d may be pre-set or configured by the eNB.

[0880] 1-5-2-2> If the HARQ-ACK transmission is indicated after time T-T0, the UE can transmit (only) HARQ-ACK on the A / N PUCCH, discarding the SR transmission.

[0881] 2> Case 2: In case of overlap between A / N PUCCH and CSI PUCCH,

[0882] 2-1> If the A / N PUCCH is PF0 / 1 and the CSI PUCCH is PF2 / 3 / 4,

[0883] - the UE transmits (only) HARQ-ACK on the A / N PUCCH, discarding the CSI transmission.

[0884] 2-2> If the A / N PUCCH is PF2 / 3 / 4 and the CSI PUCCH is PF2 / 3 / 4,

[0885] - the UE transmits UCI including HARQ-ACK bits and CSI bits on the A / N PUCCH. The (transmission) starting time of the A / N PUCCH is denoted by T1 and the (transmission) starting time of the CSI PUCCH is denoted by T2. Then, the (time-domain) CSI reference resource for the CSI can be at and before time T1-T0 and at and after time T2-T CQI the earliest (valid) DL slot that exists at and before the time T. In addition, the (valid) DL slot can refer to a slot that is configured as a DL slot (for the UE) and / or a slot that is not included in the measurement gap, and / or a slot that is included in a DL bandwidth part (BWP) where the CSI reporting is performed. In addition, T CQI may be a pre-set value between the eNB and the UE, or a value configured by the eNB for the UE.

[0886] - If the A / N PUCCH carries HARQ-ACK information for a semi-persistent scheduling (SPS) PDSCH, the UE can perform UCI multiplexing as follows.

[0887] - Based on the CSI PUCCH transmission time T,

[0888] - If the HARQ-ACK transmission is indicated at and before time T-T0, the UE transmits UCI including both HARQ-ACK bits and CSI bits on the CSI PUCCH. In the case where there are multiple CSI PUCCH resources, a (single) CSI PUCCH resource can be selected to transmit both HARQ-ACK bits and CSI bits.

[0889] - If the HARQ-ACK transmission is indicated after time T-T0, the UE transmits (only) HARQ-ACK on the A / N PUCCH, discarding the CSI transmission.

[0890] 3> Case 3: In the case where the A / N PUCCH, the CSI PUCCH, and the SR PUCCH overlap each other,

[0891] 3-1> If the A / N PUCCH is PF0 / 1, the UE discards the CSI transmission and performs the operation of Case 1 according to the combination of PUCCH resources (from the perspective of PUCCH format) configured / indicated for HARQ-ACK and SR.

[0892] 3-2> If the A / N PUCCH is PF2 / 3 / 4 and the CSI PUCCH is PF2 / 3 / 4,

[0893] 3-2-1> The UE can transmit UCI including HARQ-ACK bits, CSI bits, and explicit SR bits on the A / N PUCCH.

[0894] - Let the transmission (start) time of the A / N PUCCH be denoted by T1 and the transmission (start) time of the CSI PUCCH be denoted by T2. Then, the (time-domain) CSI reference resource for CSI can be at and before time T1-T0 and at and after time T2-T CQI the earliest (valid) DL slot existing at and before time T. In addition, the (valid) DL slot can refer to a slot configured as a DL slot (for the UE) and / or a slot not included in the measurement gap and / or a slot included in the DL BWP where the CSI report is performed. In addition, T CQI may be a preset value between the eNB and the UE or a value configured by the eNB for the UE.

[0895] In addition, the explicit SR bit can include the following information with respect to the (start) time T1 of the A / N PUCCH transmission.

[0896] The explicit SR bit indicates positive SR information when the positive SR is generated at and before time T-T0.

[0897] The explicit SR bit indicates negative SR information when the positive SR is generated after time T-T0 (until time T).

[0898] The explicit SR bit indicates negative SR information if no positive SR is generated until time T.

[0899] 3-2-2> If the A / N PUCCH includes HARQ-ACK information for the SPS PDSCH, the UE can perform UCI multiplexing as follows.

[0900] based on the CSI PUCCH transmission time T,

[0901] If the HARQ-ACK transmission is indicated at and before time T-T0, the UE transmits UCI including the HARQ-ACK bit, the CSI bit, and the explicit SR bit on the CSI PUCCH. In the case where there are multiple CSI PUCCH resources, a (single) CSI-PUCCH resource can be selected to transmit the HARQ-ACK bit and the CSI bit.

[0902] If the HARQ-ACK transmission is indicated after time T-T0, the UE discards the CSI transmission and then follows the UCI multiplexing rule between HARQ-ACK and SR (or performs the operation of the above case 1).

[0903] In the above configuration, the time axis unit of T and / or T0 can be a slot and / or an OFDM symbol. Specifically, T0 can be a time corresponding to (minimum) UL timing or UE processing time for HARQ-ACK transmission, or a time corresponding to (minimum) UL timing or UE processing time required for the UE to change the PUCCH resource and transmit the changed PUCCH resource. T0 can be predetermined (according to UE capability, etc.) or configured by the eNB.

[0904] Further, the A / N PUCCH not clear in the above description can be a PUCCH resource carrying HARQ-ACK information for a PDSCH scheduled by a DL assignment (or DL scheduling DCI).

[0905] Further, in case 1, the UE can autonomously transmit only HARQ-ACK on the A / N PUCCH, or transmit HARQ-ACK and SR in a pre-set PUCCH resource by UCI multiplexing (according to the implementation of the UE).

[0906] The 18th SR transmission method and other methods proposed in the present application can be applied in combination unless they conflict with each other.

[0907] 3.19. 19th SR transmission method

[0908] When the eNB is able to (by (UE-specific) higher layer signaling (e.g., RRC signaling)) configure the PUCCH transmission period (in OFDM symbols) and / or the (SR) PUCCH transmission start (OFDM) symbol (index) in a slot and / or the PUCCH transmission duration (in OFDM symbols) for the PUCCH resource (referred to as SR PUCCH) used for SR transmission for the UE, the UE can derive and apply the (relative) PUCCH transmission start (OFDM) symbol (index) within the PUCCH transmission period (in OFDM symbols) (for SR transmission) as follows.

[0909] [Formula 1]

[0910] N0 = N offset mod(N period -N duration )

[0911] In [Formula 1], N0, N period , N offset , and N duration represent the (relative) PUCCH transmission start (OFDM) symbol (index) within the PUCCH transmission period (in OFDM symbols) (for SR transmission), the PUCCH transmission period (in OFDM symbols), the (SR) PUCCH transmission start (OFDM) symbol (index) in a slot, and the PUCCH transmission duration (in OFDM symbols), respectively.

[0912] Further, a slot is a basic scheduling unit including a plurality of (contiguous) OFDM symbols. For example, one slot can include 14 OFDM symbols.

[0913] In the present application, the UE can expect that the eNB does not set a PUCCH transmission period (i.e., N period ≥N duration )。

[0914] In the present application, the (SR) PUCCH transmission start (OFDM) symbol (index) in the slot (configured for SR transmission) can be determined by the transmission start (OFDM) symbol (index) of the PUCCH resource configured for the UE by the eNB and / or a separate time offset (e.g., SR offset).

[0915] Further in the present application, the (relative) PUCCH transmission start (OFDM) symbol (index) within the PUCCH transmission period (in OFDM symbols) for SR PUCCH can refer to the (OFDM) symbol (index) locally indexed within the PUCCH transmission period.

[0916] More specifically, in the NR system according to the embodiment of the present application, 14 (contiguous) OFDM symbols can form one slot, and can be indexed as 0, 1, 2, …, 13. For a UE, the eNB can set the PUCCH transmission period for SR transmission to 7 OFDM symbols (N period = 7), set the PUCCH transmission duration to 2 OFDM symbols (N duration = 2), and set the PUCCH transmission start symbol (index) in the slot to 6 (N offset = 6).

[0917] If the UE simply determines the PUCCH start symbol (index) N0 within the PUCCH transmission period (for SR transmission) by the modulo operation of the transmission period (e.g., N0 = 6 mod 7 = 6), the first symbol of the SR PUCCH of length 2 symbols can be transmitted in OFDM symbol (index) 13 in the kth slot, and the second symbol can be transmitted in OFDM symbol (index) 0 in the (k+1)th slot. This operation of the UE transmitting the SR across 2 slots requires the eNB to ensure UL transmission in at least 2 slots, which is disadvantageous due to the resulting limitation on the scheduling flexibility of the eNB.

[0918] Therefore, the present application proposes a method of applying the modulo operation of the value calculated by subtracting the PUCCH transmission duration from the PUCCH transmission period (e.g., N0 = 6 mod (7-2) = 5) when calculating the PUCCH start symbol (index) N0 within the PUCCH transmission period (for SR transmission), thus limiting the SR transmission to within a single slot.

[0919] The 19th SR transmission method and other methods proposed by the present application can be applied in combination unless they conflict with each other.

[0920] 3.20. 20th SR transmission method

[0921] When a PUCCH resource for HARQ-ACK transmission (hereinafter, referred to as A / N PUCCH) is completely overlapped or partially overlapped with a PUCCH resource for SR transmission (hereinafter, referred to as SR PUCCH) on a time axis, the UE can perform UCI transmission based on the priority of HARQ-ACK and SR.

[0922] (1) In the case where SR has a higher priority than HARQ-ACK,

[0923] (1-1) When a positive SR is generated before (or at) time T MUX -T1, the UE transmits A / N and SR in a single PUCCH resource through UCI multiplexing.

[0924] (1-2) When a positive SR is generated after time T MUX -T1, the UE transmits A / N and SR in a single PUCCH resource through UCI multiplexing.

[0925] - The UE transmits SR on the SR PUCCH, and drops (or interrupts) A / N transmission.

[0926] - Alternatively, for A / N having X or less bits (e.g., X = 2), the UE transmits A / N and SR in a single PUCCH resource through UCI multiplexing.

[0927] - Alternatively, for A / N having more than X bits (e.g., X = 2), the UE transmits only A / N for a specific single PDSCH (e.g., a primary cell (PCell) PDSCH) and SR in a single PUCCH resource through UCI multiplexing.

[0928] (2) In the case where HARQ-ACK has a higher priority than SR,

[0929] (2-1) When a positive SR is generated before (or at) time T MUX -T1, the UE transmits A / N and SR in a single PUCCH resource through UCI multiplexing.

[0930] (2-2) When a positive SR is generated after time T MUX -T1, the UE transmits only A / N on the A / N PUCCH, and drops (or interrupts) SR transmission.

[0931] In the present disclosure, T MUX is the transmission time of a PUCCH resource carrying the UCI multiplexing result of A / N and SR, and T1 can be one of the following. Alternatively, T MUX -T1 can be the time at which the UE starts to encode HARQ-ACK.

[0932] 1) Option 1: (minimum) PDSCH-to-HARQ-ACK timing configured for the UE (e.g., by higher layer signaling, etc.).

[0933] 2) Option 2: PDSCH-to-HARQ-ACK timing configured / indicated for the last PDSCH (for which HARQ-ACK is to be transmitted) received by the UE.

[0934] 3) Option 3: (minimum) PDSCH-to-HARQ-ACK timing (or UE processing time) according to UE capability (or implementation).

[0935] In the above configurations, the UE can perform UCI multiplexing (between HARQ-ACK and SR) according to PUCCH format as follows.

[0936] <1> If A / N PUCCH is PF 2 / 3 / 4 and SR PUCCH is PF 0 / 1, the UE attaches SR bits to UCI, and then transmits A / N and SR on A / N PUCCH.

[0937] <2> If A / N PUCCH is PF 0 / 1 and SR PUCCH is PF 0 / 1 (except for the case where both A / N PUCCH and SR PUCCH are PF 1), the UE transmits A / N on A / N PUCCH and makes CS increase by X (e.g., X = 1) (positive SR is represented by CS increase).

[0938] <3> If A / N PUCCH is PF 1 and SR PUCCH is PF 1, the UE transmits A / N modulated symbols on SR PUCCH (positive SR is represented by selection / transmission of SR PUCCH). This operation is applicable only when the starting symbol of SR PUCCH is the same as or later than that of A / N PUCCH.

[0939] Further in the above configurations, the UE can prioritize SR and HARQ-ACK in the following manner.

[0940] 1> The eNB configures the priority relationship by higher layer signaling.

[0941] 2> The priority is determined based on the absolute value of SR periodicity. For example, if SR periodicity is equal to or less than a predetermined value, SR can have higher priority than HARQ-ACK, otherwise, HARQ-ACK can have higher priority than SR.

[0942] 3> Determine the priority by comparing the PDSCH-to-HARQ-ACK timing configured for the UE with the SR periodicity. For example, if the PDSCH-to-HARQ-ACK timing is greater than the SR periodicity, the SR can have higher priority than the HARQ-ACK, otherwise, the HARQ-ACK can have higher priority than the SR. The PDSCH-to-HARQ-ACK timing can be one of the following values.

[0943] - Option 1: The (minimum) PDSCH-to-HARQ-ACK timing configured for the UE.

[0944] - Option 2: The PDSCH-to-HARQ-ACK timing configured / indicated for the last PDSCH (for which HARQ-ACK is to be transmitted) received by the UE.

[0945] 3) Option 3: The (minimum) PDSCH-to-HARQ-ACK timing (or UE processing time) according to the UE capability (or implementation).

[0946] In the present disclosure, SR PUCCH and A / N PUCCH can refer to the PUCCH resources configured and / or indicated for (only) SR transmission and (only) HARQ-ACK transmission, respectively.

[0947] Also in the present disclosure, PF 0, PF 1, PF 2, PF 3 and PF 4 can represent PUCCH format 0, PUCCH format 1, PUCCH format 2, PUCCH format 3 and PUCCH format 4, respectively, and PF X / Y can represent PF X or PF Y.

[0948] Also in the present disclosure, PDSCH-to-HARQ-ACK timing can refer to the time period spanning from the end of PDSCH to the time of HARQ-ACK transmission.

[0949] Also in the present disclosure, when it is said that a positive SR is generated, it can mean that UL data to be transmitted by the UE is generated or the UE determines that UL scheduling is requested.

[0950] More specifically, in UCI multiplexing between HARQ-ACK and SR, a positive SR can be generated after the UE starts encoding for HARQ-ACK or starts transmitting PUCCH for HARQ-ACK. Herein, it can be necessary to consider how the UE is to handle the SR.

[0951] In case that HARQ-ACK has higher priority than SR, when positive SR is generated before encoding of HARQ-ACK, the UE can multiplex SR with HARQ-ACK and transmit the multiplexed SR and HARQ-ACK in a single PUCCH resource, otherwise, the UE can transmit only HARQ-ACK and postpone SR transmission to the next occasion.

[0952] However, in the NR system according to the embodiment of the present application, in order to support services such as URLLC, there can be SR transmission requiring low latency, and the SR transmission can have higher priority than HARQ-ACK transmission.

[0953] In case that SR has higher priority than HARQ-ACK as described above, when positive SR is generated before encoding of HARQ-ACK, the UE can multiplex SR with HARQ-ACK and transmit the multiplexed SR and HARQ-ACK in a single PUCCH resource, otherwise, the UE can transmit only SR and drop or interrupt HARQ-ACK transmission.

[0954] The starting time of HARQ-ACK encoding at the UE can depend mainly on the implementation of the UE, or can be preset as a time before (minimum) PDSCH-to-HARQ-ACK timing with respect to the transmission starting time of the PUCCH resource carrying the multiplexed result of UCI. Herein, the eNB is preferably allowed to control the priority of HARQ-ACK and SR. For example, the following options can be considered for the eNB to control the priority of HARQ-ACK and SR.

[0955] [1] Option 1: Relative priority is configured through higher layer signaling (e.g., RRC signaling).

[0956] [2] Option 2: Relative priority is configured according to absolute value of SR periodicity.

[0957] [3] Option 3: Relative priority is determined based on the relationship between PDSCH-to-HARQ-ACK timing and SR periodicity.

[0958] In Option 2, for example, if the SR periodicity is equal to or less than a predetermined value, the UE can determine that SR has higher priority than HARQ-ACK. Conversely, if the SR periodicity is greater than the predetermined value, the UE can determine that HARQ-ACK has higher priority than SR.

[0959] In Option 3, for example, if the SR periodicity is less than the PDSCH-to-HARQ-ACK timing configured for the UE, the UE can determine that SR has higher priority than HARQ-ACK. Otherwise, the UE can determine that HARQ-ACK has higher priority than SR.

[0960] Figure 12 is a diagram illustrating a UE's SR transmission period when SR has higher priority than HARQ-ACK according to the present application.

[0961] Figure 12 depicts a case where SR has higher priority than HARQ-ACK when HARQ-ACK and SR are prioritized as in Option 3 due to SR periodicity being shorter than (minimum) PDSCH-to-HARQ-ACK timing.

[0962] Thus, upon generating a positive SR, the UE can transmit only the SR, discarding the HARQ-ACK transmission. However, if a positive SR is generated during the transmission of HARQ-ACK, the UE can transmit the SR, interrupting the HARQ-ACK transmission.

[0963] Figure 13 and Figure 14 is a diagram illustrating a UE's SR transmission method when HARQ-ACK has higher priority than SR according to the present application.

[0964] Figure 13 and Figure 14 depicts a case where HARQ-ACK has higher priority than SR when HARQ-ACK and SR are prioritized as in Option 3 due to SR periodicity being longer than (minimum) PDSCH-to-HARQ-ACK timing. Then, upon generating a positive SR before the encoding of HARQ-ACK begins, the UE can transmit HARQ-ACK and SR in a single PUCCH resource through UCI multiplexing, otherwise, the UE can transmit HARQ-ACK, deferring SR transmission until the next period.

[0965] In the above configuration, the reason for setting (minimum) PDSCH-to-HARQ-ACK timing as a reference time of SR periodicity is that this value corresponds to the end time of a bundling window to which the UE refers for HARQ-ACK multiplexing. That is, the eNB can expect the UE to start encoding HARQ-ACK after detecting all PDSCHs within at least the bundling window.

[0966] In addition, the single PUCCH resource carrying HARQ-ACK and SR for UCI multiplexing can be defined according to the PUCCH format of the PUCCH resource carrying HARQ-ACK and SR as follows.

[0967] 1] If A / N PUCCH is PF 2 / 3 / 4 and SR PUCCH is PF 0 / 1, the UE attaches SR bits to UCI, then transmits A / N and SR on A / N PUCCH.

[0968] 2] If A / N PUCCH is PF 0 / 1 and SR PUCCH is PF 0 / 1 (except for the case where both A / N PUCCH and SR PUCCH are PF 1), the UE transmits A / N on A / N PUCCH and increases CS by X (e.g., X = 1) (positive SR is represented by CS increase).

[0969] 3] If A / N PUCCH is PF 1 and SR PUCCH is PF 1, the UE transmits A / N modulated symbols on SR PUCCH (positive SR is represented by selection / transmission of SR PUCCH). If the starting symbol of SR PUCCH is earlier than that of A / N PUCCH, the UE can transmit A / N only on A / N PUCCH, discarding SR transmission.

[0970] In the case where both A / N PUCCH and SR PUCCH are PF 1, the UE can perform the above operation only when SR PUCCH and AN PUCCH start in the same symbol in order to prevent reduction of UE processing time for HARQ-ACK encoding when transmitting HARQ-ACK information on SR PUCCH. Otherwise, the UE can discard SR or HARQ-ACK transmission according to its priority.

[0971] In addition, when a HARQ-ACK (A / N) PUCCH resource (referred to as A / N PUCCH) to be transmitted by the UE is fully overlapped or partially overlapped with a SR PUCCH resource (referred to as SR PUCCH) to be transmitted by the UE in a time axis, the A / N PUCCH can be PF 2 / 3 / 4 and the SR PUCCH can be PF 0 / 1. Then, the UE can represent SR information in an explicit bit and then transmit encoded modulated symbols of the SR bit in punctured REs of the A / N PUCCH. (i.e., piggybacking SR in some specific REs of the A / N PUCCH.)

[0972] The modulation order of the SR bit can be equal to that of the A / N.

[0973] In addition, the number of encoded modulated symbols of SR (per layer) can vary according to the size of the UCI payload for SR and the SR design parameter beta-offset.

[0974] In addition, the SR REs mapped to the REs of the A / N PUCCH by puncturing can be limited to a subset of the (UCI) REs of the A / N PUCCH in the OFDM symbol in which the A / N and SR overlap.

[0975] More specifically, the number of coded and modulated symbols for SR (per layer) can be calculated based on the coding rate of A / N (or the UCI payload size of A / N, the size of CRC bits for A / N, and the number of REs carrying A / N on A / N PUCCH) or the maximum coding rate of A / N PUCCH, the design parameter beta-offset for SR, the modulation order for (of) SR, and the UCI payload size for (of) SR.

[0976] For example, if the coding rate of A / N (or the maximum coding rate of A / N PUCCH) is denoted by c0, the design parameter beta-offset configured for SR is denoted by the modulation order for SR is denoted by M SR the UCI payload size for SR is denoted by O SR the size of CRC bits for SR is denoted by L SR then the number of coded and modulated symbols for SR (per layer) Q' SR can be calculated by the following equation.

[0977] [Equation 2]

[0978]

[0979] In [Equation 2], UB SR denotes an upper bound of the number of coded and modulated symbols for SR (per layer). For example, UB SR may be the number of (UCI) REs in A / N PUCCH in the OFDM symbol in which A / N overlaps with SR.

[0980] In addition, when a HARQ-ACK (A / N) PUCCH resource (referred to as A / N PUCCH) to be transmitted by a UE is completely overlapped or partially overlapped with an SR PUCCH resource (referred to as SR PUCCH) to be transmitted by the UE on a time axis, the UE can perform UCI transmission based on the priority of HARQ-ACK (A / N) and SR as follows.

[0981] (A) In the case where A / N PUCCH is PF 2 / 3 / 4 and SR PUCCH is PF 0 / 1,

[0982] (A-1) If A / N has a higher priority than SR (or A / N PUCCH and SR PUCCH start in a gated symbol),

[0983] - the UE transmits a UCI payload configured by attaching SR bits to A / N on A / N PUCCH.

[0984] - If it is determined that no UL data arrives until the beginning of the encoding of the UCI to be transmitted on the A / N PUCCH, the UE considers this as a negative SR.

[0985] (A-2) If the SR has higher priority than the A / N,

[0986] - Option 1: The UE transmits only the SR PUCCH, while dropping the A / N transmission.

[0987] - Option 2: The UE transmits (whole or partial) SR PUCCH in the overlapped (OFDM) symbol by puncturing the A / N PUCCH REs in the (OFDM) symbol.

[0988] - Option 3: The UE transmits A / N on the A / N PUCCH, while the UE indicates (whole or partial) SR in the explicit bit and transmits the modulated symbols of the encoding of the SR in some punctured REs of the A / N PUCCH.

[0989] (B) In the case where the A / N PUCCH is PF 0 / 1 and the SR PUCCH is PF 0 / 1 (except the case where both the A / N PUCCH and the SR PUCCH are PF 1),

[0990] (B-1) If the A / N has higher priority than the SR (or the A / N PUCCH and the SR PUCCH start in the same symbol),

[0991] - For positive SR, the UE transmits A / N on the A / N PUCCH with CS increase, and for negative SR, the UE transmits A / N in the A / N PUCCH resource. The CS increase can be applied to the whole (OFDM) symbol or the A / N PUCCH resource in the (OFDM) symbol overlapped with the SR.

[0992] - If it is determined that no UL data arrives until the beginning of the modulation of the A / N PUCCH, the UE considers this as a negative SR (or the negative SR determination depends on the UE implementation).

[0993] (B-2) If the SR has higher priority than the A / N,

[0994] - Option 1: The UE transmits only the SR PUCCH, while dropping the A / N transmission.

[0995] - Option 2: The UE transmits (whole or partial) SR PUCCH in the overlapped (OFDM) symbol by puncturing the A / N PUCCH REs in the (OFDM) symbol.

[0996] - Option 3: UE transmits A / N on A / N PUCCH, while UE indicates (whole or partial) SR by changing CS (or sequence) in overlapped (OFDM) symbol.

[0997] (C) In case A / N PUCCH is PF1 and SR PUCCH is PF1,

[0998] (C-1) If A / N has higher priority than SR (or A / N PUCCH and SR PUCCH start in the same symbol),

[0999] - For positive SR, UE transmits A / N in SR PUCCH resource, for negative SR, UE transmits A / N in A / N PUCCH resource.

[1000] - If it is determined that no UL data arrives until the start of modulation (or subcarrier mapping) of A / N PUCCH, UE considers this as negative SR (or negative SR determination depends on UE implementation).

[1001] (C-2) If SR has higher priority than A / N,

[1002] - Option 1: UE transmits only SR PUCCH, while discarding A / N transmission.

[1003] - Option 2: UE punctures A / N PUCCH REs in overlapped (OFDM) symbol, and transmits (whole or partial) SR PUCCH in (OFDM) symbol.

[1004] - Option 3: UE transmits A / N on A / N PUCCH, while UE transmits (whole or partial) SR by changing CS (or sequence) in overlapped (OFDM) symbol.

[1005] In the above configurations, the priority of A / N and SR can be determined according to one or more of the following priority order rules in combination, or configured by higher layer signaling and / or DCI from eNB.

[1006] A) Option 1: PUCCH with shorter PUCCH duration has higher priority.

[1007] B) Option 2: PUCCH with shorter periodicity or shorter UL timing (e.g., PDSCH-to-HARQ-ACK timing) has higher priority.

[1008] C) Option 3: PUCCH with earlier starting symbol has higher priority.

[1009] In addition, based on such understanding, the following description is given: the relative priority between A / N and SR is determined by the PUCCH duration of A / N, SR periodicity, and (minimum) UL timing (e.g., PDSCH-to-HARQ-ACK timing). Specifically, if UCI 1 is transmitted on a long PUCCH, then UCI 2 has priority over UCI 1 only if UCI 2 is transmitted on a short PUCCH and has a shorter periodicity (or shorter (minimum) UL timing). In any other case, it is assumed that the UCI corresponding to the A / N between UCI 1 and UCI 2 has higher priority.

[1010] If A / N PUCCH is PF 3 / 4 and SR PUCCH is PF 1,

[1011] - UE transmits on A / N PUCCH UCI payload configured by appending SR bits to A / N.

[1012] - If it is determined that no UL data arrives until the beginning of encoding of UCI to be transmitted on A / N PUCCH, the UE considers this as negative SR.

[1013] In case of A / N PUCCH being PF 3 / 4 and SR PUCCH being PF 0,

[1014] <b-1>If SR periodicity < (minimum) PDSCH to HARQ-ACK timing,

[1015] - Option 1: UE only sends SR PUCCH and drops A / N transmission.

[1016] - Option 2: UE punctures A / N PUCCH REs in the overlapped (OFDM) symbol and transmits (full or partial) SR PUCCH in the (OFDM) symbol.

[1017] - Option 3: UE transmits A / N on A / N PUCCH, indicates (full or partial) SR in explicit bits and transmits encoded modulated symbols of SR in some punctured REs of A / N PUCCH.

[1018] <b-2>If SR periodicity >= (minimum) PDSCH-to-HARQ-ACK timing,

[1019] - UE transmits on A / N PUCCH UCI payload configured by appending SR bits to A / N.

[1020] - If it determines that no UL data arrives until the beginning of encoding of UCI to be transmitted on A / N PUCCH, UE considers this as negative SR.

[1021] <c>In case A / N PUCCH is PF 1 and SR PUCCH is PF 1,

[1022] - For positive SR, UE transmits A / N in SR PUCCH resource, for negative SR, UE transmits A / N in A / N PUCCH resource.

[1023] - If it is determined that no UL data arrives until the start of modulation (or subcarrier mapping) of A / N PUCCH, the UE considers this as negative SR (or negative SR determination depends on UE implementation).

[1024] <d>In case A / N PUCCH is PF 1 and SR PUCCH is PF 0,

[1025] <b-1>If SR periodicity < (minimum) PDSCH-to-HARQ-ACK timing,

[1026] - Option 1: UE only sends SR PUCCH, while dropping A / N transmission.

[1027] - Option 2: UE punctures A / N PUCCH REs in the overlapped (OFDM) symbol and transmits (full or partial) SR PUCCH in the (OFDM) symbol.

[1028] - Option 3: UE transmits A / N on A / N PUCCH, while transmitting (full or partial) SR by changing CS (or sequence) in the overlapped (OFDM) symbol.

[1029] <d-2>If SR periodicity >= (minimum) PDSCH-to-HARQ-ACK timing

[1030] - For positive SR, UE transmits A / N on A / N PUCCH with CS increase, for negative SR, UE transmits A / N in A / N PUCCH. The CS increase can be applied to the whole (OFDM) symbol or the A / N resource in the (OFDM) symbol overlapping with SR.

[1031] - If it is determined that no UL data arrives until the start of modulation (or subcarrier mapping) of A / N PUCCH, the UE considers this as negative SR (or negative SR determination depends on UE implementation).

[1032] <e>If A / N PUCCH is PF 2 and SR PUCCH is PF 0 / 1,

[1033] - UE transmits on A / N PUCCH UCI payload configured by appending SR bits to A / N.

[1034] - If it is determined that no UL data arrives until the beginning of encoding of UCI to be transmitted on A / N PUCCH, the UE considers this as negative SR.

[1035] <f>If A / N PUCCH is PF 0 and SR PUCCH is PF 0 / 1,

[1036] - For positive SR, UE transmits A / N on A / N PUCCH with CS increase, for negative SR, UE transmits A / N in A / N PUCCH resource. The CS increase can be applied to the whole (OFDM) symbol or A / N PUCCH resource in (OFDM) symbol overlapped with SR.

[1037] - If it is determined that no UL data arrives until the start of modulation (subcarrier mapping) of A / N PUCCH, UE considers this as negative SR (or negative SR determination depends on UE implementation).

[1038] In the above configuration, (minimum) PDSCH-to-HARQ-ACK timing can be the minimum value of PDSCH-to-HARQ-ACK timing configured or preset for A / N PUCCH.

[1039] The 20th SR transmission method and other methods proposed in this application can be applied in combination unless they conflict with each other.

[1040] 3.21. The 21st SR transmission method

[1041] When the HARQ-ACK PUCCH resource (A / N PUCCH) to be transmitted by the UE completely overlaps or partially overlaps with the CSI PUCCH resource (CSI PUCCH) in the time axis, the UE can transmit HARQ-ACK and CSI on a single PUCCH by UCI multiplexing, and determine the CSI reference resource as follows.

[1042] (1) In the case of a single PUCCH being A / N PUCCH,

[1043] The (time-domain) CSI reference resource for CSI can be the earliest (valid) DL slot before (or at) time T A / N -T1and before (or at) time T CSI -T CQI .

[1044] (2) In the case of a single PUCCH being CSI PUCCH,

[1045] The (time-domain) CSI reference resource for CSI can be the earliest (valid) DL slot before (or at) time T CSI -T1and before (or at) time T CSI -T CQI .

[1046] Herein, T A / N It can be the A / N PUCCH transmission time, and T1 can be one of the following timings.

[1047] - Option 1: Configure the (minimum) PDSCH to HARQ-ACK timing for the UE.

[1048] - Option 2: PDSCH to HARQ-ACK timing for the last PDSCH received by the UE (to which HARQ-ACK should be sent).

[1049] Option 3: Minimum PDSCH to HARQ-ACK timing based on UE capabilities (or implementation).

[1050] In this article, T CSI It is the CSI PUCCH transmission time, T CQI It can be a value preset between the eNB and the UE, or a value configured by the eNB for the UE.

[1051] In addition, CSI reference resources may refer to the time resources referenced in CSI calculations, and (valid) DL slots may refer to slots configured as DL slots (for UE) and / or slots not included in measurement gaps, and / or slots included in DLBWPs that perform CSI reporting.

[1052] In addition, the PDSCH to HARQ-ACK timing can refer to the time period from the end of PDSCH to the HARQ-ACK transmission time.

[1053] More specifically, if the PDSCH corresponding to HARQ-ACK is a DL-assigned PDSCH, then HARQ-ACK / SR and CSI can be transmitted on an AN PUCCH. Therefore, if the PUCCH resource carrying HARQ-ACK / SR overlaps with the PUCCH resource carrying CSI on the time axis, the UE can always transmit HARQ-ACK / SR and CSI in a single PUCCH resource via UCI multiplexing, only changing the CSI reference resource used for CSI calculation to ensure UE processing time for HARQ-ACK.

[1054] For example, suppose the CSI reference resource used for CSI-only transmission is later than the start time of HARQ-ACK encoding. When the UE needs to jointly encode HARQ-ACK and CSI after CSI calculation, because the UE performs joint encoding later than the encoding of HARQ-ACK only, the UE processing time up to the PUCCH transmission time may not be guaranteed.

[1055] Therefore, in the case where the PUCCH (for HARQ-ACK / SR transmission) overlaps with the CSI PUCCH in the time axis, the present application proposes a method of always transmitting HARQ-ACK / SR and CSI on a single PUCCH through UCI multiplexing and changing a CSI reference resource so that the CSI reference resource exists before (minimum) PDSCH-to-HARQ-ACK timing with respect to the PUCCH resource to carry the multiplexed UCI.

[1056] More specifically, in the NR system according to the embodiment of the present application, the CSI reference resource can be defined as depicted in the following table.

[1057] [Table 26]

[1058]

[1059] Herein, n CQI_ref may be set to be greater than (minimum) PDSCH-to-HARQ-ACK timing. Therefore, the CSI calculation can not affect the UE processing time for HARQ-ACK. In particular, n can represent a slot carrying the CSI in this case.

[1060] The 21st SR transmission method and other methods proposed by the present application can be applied in combination unless they conflict with each other.

[1061] < / f> < / e> < / d> < / c> Figure 15 is a flowchart illustrating a method of transmitting an SR by a UE according to the present application.

[1062] The UE first receives first configuration information for one or more first UL resources for SR transmission from the eNB (S1510). The first configuration information can be received through higher layer signaling.

[1063] The UE then receives second configuration information for a second UL resource for UCI transmission from the eNB (S1520). The second configuration information can be received in DCI.

[1064] If N (N is a natural number greater than 1) first UL resources for N SR transmissions overlap with the second UL resource in the time domain, the UE transmits bit information indicating SR information for N SR configurations (or SR processes) together with UCI in the second UL resource (S1530).

[1065] The bit information indicating the SR information for the N SR configurations can indicate information about one SR configuration of the N SR configurations and positive SR information corresponding to the one SR configuration.

[1066] Alternatively, the bit information indicating the SR information for the N SR configurations can include a plurality of bits indicating whether SR information corresponding to each of the N SR configurations is positive SR or negative SR.

[1067] For example, if the SR information corresponding to each of the plurality of bits is positive SR, the bit has a value of 1, and if the SR information is negative SR, the bit has a value of 0.

[1068] Further, the plurality of bits can be configured in the order of identification information about the N SR configurations. For example, the plurality of bits can be configured in the order of SR process (or SR configuration) indices of the SR information corresponding to the plurality of bits.

[1069] In the present application, the first UL resource and the second UL resource can completely overlap or partially overlap with each other in the time domain.

[1070] Further, in the present application, the second UL resource can be a PUCCH resource carrying HARQ-ACK information.

[1071] In the above configuration, the UCI can include one or more of CSI and HARQ-ACK information.

[1072] The UE can transmit the bit information indicating the SR information for the N SR configurations together with the HARQ-ACK information in the second UL resource in various methods. For example, the UE generates a UCI payload by combining the bit information indicating the SR information for the N SR configurations with the UCI, generates a coded bit format of the UCI payload, and transmits the coded bit format in the second UL resource. Accordingly, the UE can transmit the bit information indicating the SR information for the N SR configurations together with the UCI in the second UL resource.

[1073] The eNB transmits first configuration information of one or more first UL resources for SR transmission and transmits second configuration information of a second UL resource carrying ACK / NACK information corresponding to the operation of the UE.

[1074] When the N first UL resources for the N SR transmissions overlap with the second UL resource in the time domain, the eNB receives the bit information indicating the SR information for the N SR configurations together with the UCI in the second UL resource.

[1075] In addition, the UE according to the present application can transmit the SR in the following manner.

[1076] The UE first determines a first PUCCH format carrying SR information and a second PUCCH format carrying HARQ-ACK information. The first and second PUCCH formats carrying the SR information and the HARQ-ACK information can be determined according to the configuration information of the eNB and / or the UCI payload to be transmitted.

[1077] If the first PUCCH format is a PUCCH format including one or two symbols and supporting up to 2 bits of UCI, the second PUCCH format is a PUCCH format including 4 or more symbols and supporting up to 2 bits of UCI, and the SR information is a positive SR, the UE can transmit only the HARQ-ACK information in the second PUCCH format.

[1078] In this way, the UE can simultaneously transmit the SR information and the HARQ-ACK information.

[1079] More specifically, the UE can perform simultaneous transmission of the SR and the HARQ-ACK information only when the first UL resource carrying the SR information overlaps with the second UL resource carrying the HARQ-ACK information in the time domain.

[1080] Thus, in case the first UL resource carrying the SR information overlaps with the second UL resource carrying the HARQ-ACK information in the time domain as described above, the eNB can implicitly determine the SR information intended by the UE as positive SR upon receiving the HARQ-ACK information from the UE only in the PUCCH format for the HARQ-ACK information transmission.

[1081] Since each of the embodiments of the proposed method can be considered as a method for implementing the present application, it is obvious that each of the embodiments can be considered as the proposed method. In addition, the present application can be implemented not only independently using the proposed method but also by combining (or merging) some of the proposed methods. In addition, a rule can be defined that information on whether to apply the proposed method (or information on a rule related to the proposed method) should be transmitted from the eNB to the UE through a pre-defined signal (e.g., a physical layer signal, a higher layer signal, etc.).

[1082] 4. Device configuration

[1083] Figure 16 is a diagram illustrating a configuration of a UE and a base station capable of being implemented by the embodiments proposed in the present application. Figure 16 The illustrated UE and base station operate to implement the above-described embodiments of the method of transmitting and receiving an SR between the UE and the base station.

[1084] The UE 1 can function as a transmission end on the UL and as a reception end on the DL. The base station (eNB or gNB) 100 can function as a reception end on the UL and as a transmission end on the DL.

[1085] That is, each of the UE and the base station can include a transmitter (Tx) 10 or 110 and a receiver (Rx) 20 or 120 for controlling transmission and reception of information, data, and / or messages, and an antenna 30 or 130 for transmitting and receiving the information, data, and / or messages.

[1086] Each of the UE and the base station can further include a processor 40 or 140 for implementing the above-described embodiments of the present disclosure, and a memory 50 or 150 for temporarily or permanently storing operations of the processor 40 or 140.

[1087] The UE having the above-described configuration receives, from the base station 100, first configuration information of one or more first UL resources for SR transmission and second configuration information of a second UL resource carrying UCI. When N first UL resources for N SR transmissions (N is a natural number greater than 1) overlap with the second UL resource in the time domain, the UE 1 transmits, through the Tx 10, bit information indicating SR information for the N SR configurations together with the UCI in the second UL resource.

[1088] Corresponding to the operation of the UE 1, the base station 100 transmits, through the Tx 110, first configuration information of one or more first UL resources for SR transmission and second configuration information of a second UL resource carrying UCI to the UE 1. When N first UL resources (N is a natural number greater than 1) for SR transmission overlap with the second UL resource in the time domain, the base station 100 receives, through the Rx 120, bit information indicating SR information for N SR configurations together with UCI in the second UL resource.

[1089] The Tx and the Rx of the UE and the base station can perform a packet modulation / demodulation function, a high-speed packet channel coding function, an OFDM packet scheduling, a TDD packet scheduling, and / or a channelization for data transmission. Figure 16 Each of the UE and the base station of the disclosure can further include a low-power radio frequency (RF) / intermediate frequency (IF) module.

[1090] Further, the UE can be any one of a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a global system for mobile (GSM) phone, a wideband code division multiple access (WCDMA) phone, a mobile broadband system (MBS) phone, a handheld PC, a laptop PC, a smart phone, a multi-mode-multi-band (MM-MB) terminal, etc.

[1091] The smart phone is a terminal taking the advantages of both a mobile phone and a PDA. It merges the functions of a PDA, i.e., scheduling and data communication (e.g., facsimile transmission and reception) and Internet connection, into a mobile phone. The MM-MB terminal refers to a terminal having a multi-modem chip built-in and operable under any one of a mobile Internet system and other mobile communication systems (e.g., CDMA 2000, WCDMA, etc.).

[1092] Embodiments of the disclosure can be implemented by various means, for example, hardware, firmware, software, or a combination thereof.

[1093] In a hardware configuration, the method according to the exemplary embodiments of the disclosure can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, etc.

[1094] In a firmware or software configuration, the method according to the embodiments of the present disclosure can be implemented in the form of modules, procedures, functions, and the like for performing the above-described functions or operations. Software code can be stored in the memory 50 or 150 and executed by the processor 40 or 140. The memory is located at the interior or exterior of the processor and can transmit data to and receive data from the processor via various known means.

[1095] Those skilled in the art will appreciate that the present disclosure can be carried out in other specific ways than those set forth herein without departing from the spirit and essential characteristics of the present disclosure. The above embodiments are therefore to be construed in all aspects as illustrative and not restrictive. The scope of the present disclosure should be determined by the appended claims and their legal equivalents rather than by the above description, and all changes that come within the meaning and equivalency range of the appended claims are intended to be embraced therein. It will be apparent to those skilled in the art that claims not explicitly recited in the claims section can be presented in combination as embodiments of the present disclosure, or included as new claims through subsequent amendment after the application is filed, by those skilled in the art.

[1096] Industrial Applicability

[1097] The present disclosure is applicable to various wireless access systems including 3GPP systems and / or 3GPP2 systems. In addition to these wireless access systems, the embodiments of the present disclosure are applicable to all technical fields to which wireless access systems can be applied. Furthermore, the proposed method can also be applied to mmWave communication using an ultra-high frequency band.

Claims

1. A method, comprising: receiving, by a user equipment (UE) , information related to a first resource for transmission of a scheduling request (SR) and information related to a second resource for transmission of hybrid automatic repeat request-acknowledgement (HARQ-ACK) information, wherein the first resource overlaps with the second resource; and based on the transmission of the SR being configured to use a physical uplink control channel (PUCCH) format 0 and the transmission of the HARQ-ACK information being configured to use a PUCCH format 1, transmitting, by the UE, only a PUCCH with the HARQ-ACK information in the second resource using the PUCCH format 1.

2. The method of claim 1, wherein, The information related to the first resource is received through higher layer signaling.

3. The method of claim 1, wherein, Based on the transmission of the SR being configured to use the PUCCH format 0 and the transmission of the HARQ-ACK information being configured to use the PUCCH format 1, the transmission of the SR is dropped.

4. The method of claim 1, wherein, The first resource partially overlaps with the second resource in time domain. 5.A user equipment (UE) , the UE comprising: at least one processor; and at least one computer memory storing instructions that, when executed by the at least one processor, cause the UE to perform operations comprising: receiving, by a user equipment (UE) , information related to a first resource for transmission of a scheduling request (SR) and information related to a second resource for transmission of hybrid automatic repeat request-acknowledgement (HARQ-ACK) information, wherein the first resource overlaps with the second resource; and based on the transmission of the SR being configured to use a physical uplink control channel (PUCCH) format 0 and the transmission of the HARQ-ACK information being configured to use a PUCCH format 1, transmitting, by the UE, only a PUCCH with the HARQ-ACK information in the second resource using the PUCCH format 1.

6. The UE of claim 5, wherein, The information related to the first resource is received through higher layer signaling.

7. The UE of claim 5, wherein, Based on the transmission of the SR being configured to use the PUCCH format 0 and the transmission of the HARQ-ACK information being configured to use the PUCCH format 1, the transmission of the SR is dropped.

8. The UE of claim 5, wherein, The first resource partially overlaps with the second resource in time domain. 9.A method, comprising: transmitting, by a base station (BS) , information related to a first resource for transmission of a scheduling request (SR) and information related to a second resource for transmission of hybrid automatic repeat request-acknowledgement (HARQ-ACK) information, wherein the first resource overlaps with the second resource; and based on the transmission of the SR being configured to use a physical uplink control channel (PUCCH) format 0 and the transmission of the HARQ-ACK information being configured to use a PUCCH format 1, receiving, by the BS, only a PUCCH with the HARQ-ACK information in the second resource using the PUCCH format 1. 10.A base station (BS) , the BS comprising: at least one processor; and at least one computer memory storing instructions that, when executed by the at least one processor, cause the BS to perform operations comprising: transmitting information related to a first resource for transmission of a scheduling request (SR) and information related to a second resource for transmission of hybrid automatic repeat request-acknowledgement (HARQ-ACK) information, wherein the first resource overlaps with the second resource; and based on the transmission of the SR being configured to use a physical uplink control channel (PUCCH) format 0 and the transmission of the HARQ-ACK information being configured to use a PUCCH format 1, receiving only a PUCCH with the HARQ-ACK information in the second resource using a PUCCH format 1.

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